gogio: [iOS] fix compatibility with Apple Connect and iPad requirement

This pach fixes a total of 6 issues caused by gogio,
when uploading .ipa to Apple Connect/Apple Store.

1. Asset validation failed (90474), caused by not set
"UIInterfaceOrientationPortraitUpside" in plist.

2. Asset validation failed (90482), the executable contains
bitcode. Now, gogio will use "bitcode_strip" to remove such
bitcode.

3. Asset validation failed (90060), the version can only have
three non-negative numbers. Using values from semVer is
invalid (such as 1.2.3.4), it must be either 1.2.3 or
1.2.34. Now, gogio uses the later one.

4. Asset validation failed (90476), supporting multitask on
iPad requires UILaunchScreen. That is tricky to solve, instead
gogio will NOT support multitask on iPad.

5. Asset validation failed (90208), version mismatch between
plist and binary. Now, gogio will use compile flags to set
the version AND will use the proper minSdk on plist.

6. Asset validation failed (90023), missing 152x152 icon for
iPad. Now, gogio will create such icon.

Signed-off-by: inkeliz <inkeliz@inkeliz.com>
Signed-off-by: Elias Naur <mail@eliasnaur.com>

gogio/iosbuild.go

@@ -202,6 +202,7 @@ func exeIOS(tmpDir, target, app string, bi *buildInfo) error {
 		}
 		cflags = append(cflags,
 			"-fobjc-arc",
+			fmt.Sprintf("-miphoneos-version-min=%d.0", bi.minsdk),
 		)
 		cflagsLine := strings.Join(cflags, " ")
 		exeSlice := filepath.Join(tmpDir, "app-"+a)
@@ -271,6 +272,9 @@ func iosIcons(bi *buildInfo, tmpDir, appDir, icon string) (string, error) {
 	err := buildIcons(appIcon, icon, []iconVariant{
 		{path: "ios_2x.png", size: 120},
 		{path: "ios_3x.png", size: 180},
+		{path: "ipad_1x.png", size: 76},
+		{path: "ipad_2x.png", size: 152},
+		{path: "ipad_4x.png", size: 228},
 		// The App Store icon is not allowed to contain
 		// transparent pixels.
 		{path: "ios_store.png", size: 1024, fill: true},
@@ -279,26 +283,44 @@ func iosIcons(bi *buildInfo, tmpDir, appDir, icon string) (string, error) {
 		return "", err
 	}
 	contentJson := `{
-	"images" : [
-		{
-			"size" : "60x60",
-			"idiom" : "iphone",
-			"filename" : "ios_2x.png",
-			"scale" : "2x"
-		},
-		{
-			"size" : "60x60",
-			"idiom" : "iphone",
-			"filename" : "ios_3x.png",
-			"scale" : "3x"
-		},
-		{
-			"size" : "1024x1024",
-			"idiom" : "ios-marketing",
-			"filename" : "ios_store.png",
-			"scale" : "1x"
-		}
-	]
+"images": [
+    {
+        "size": "60x60",
+        "idiom": "iphone",
+        "filename": "ios_2x.png",
+        "scale": "2x"
+    },
+    {
+        "size": "60x60",
+        "idiom": "iphone",
+        "filename": "ios_3x.png",
+        "scale": "3x"
+    },
+    {
+        "size": "76x76",
+        "idiom": "ipad",
+        "filename": "ipad_1x.png",
+        "scale": "1x"
+    },
+    {
+        "size": "76x76",
+        "idiom": "ipad",
+        "filename": "ipad_2x.png",
+        "scale": "2x"
+    },
+    {
+        "size": "152x152",
+        "idiom": "ipad",
+        "filename": "ipad_4x.png",
+        "scale": "2x"
+    },
+    {
+        "size": "1024x1024",
+        "idiom": "ios-marketing",
+        "filename": "ios_store.png",
+        "scale": "1x"
+    }
+]
 }`
 	contentFile := filepath.Join(appIcon, "Contents.json")
 	if err := os.WriteFile(contentFile, []byte(contentJson), 0o600); err != nil {
@@ -345,10 +367,10 @@ func buildInfoPlist(bi *buildInfo) string {
 	}{
 		AppName:         appName,
 		AppID:           bi.appID,
-		Version:         bi.version.String(),
+		Version:         bi.version.StringCompact(),
 		VersionCode:     bi.version.VersionCode,
 		Platform:        platform,
-		MinVersion:      minIOSVersion,
+		MinVersion:      bi.minsdk,
 		SupportPlatform: supportPlatform,
 		Schemes:         bi.schemes,
 	}
@@ -382,7 +404,7 @@ func buildInfoPlist(bi *buildInfo) string {
 	<key>DTPlatformVersion</key>
 	<string>12.4</string>
 	<key>MinimumOSVersion</key>
-	<string>{{.MinVersion}}</string>
+	<string>{{.MinVersion}}.0</string>
 	<key>UIDeviceFamily</key>
 	<array>
 		<integer>1</integer>
@@ -395,9 +417,12 @@ func buildInfoPlist(bi *buildInfo) string {
 	<key>UISupportedInterfaceOrientations</key>
 	<array>
 		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
 		<string>UIInterfaceOrientationLandscapeLeft</string>
 		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
+	<key>UIRequiresFullScreen</key>
+	<true/>
 	<key>DTCompiler</key>
 	<string>com.apple.compilers.llvm.clang.1_0</string>
 	<key>DTPlatformBuild</key>
@@ -410,6 +435,8 @@ func buildInfoPlist(bi *buildInfo) string {
 	<string>1030</string>
 	<key>DTXcodeBuild</key>
 	<string>10G8</string>
+	<key>UILaunchScreen</key>
+	<true/>
     {{if .Schemes}}
 	<key>CFBundleURLTypes</key>
 	<array>
@@ -575,7 +602,6 @@ func iosCompilerFor(target, arch string, minsdk int) (string, []string, error) {
 		return "", nil, err
 	}
 	cflags := []string{
-		"-fembed-bitcode",
 		"-arch", allArchs[arch].iosArch,
 		"-isysroot", sdkPath,
 		"-m" + platformOS + "-version-min=" + strconv.Itoa(minsdk),