gogio: [macOS] support custom profile

This patch enables `-signkey` to load provisioning profiles.

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

gogio/macosbuild.go

@@ -148,7 +148,7 @@ func (b *macBuilder) setInfo(buildInfo *buildInfo, name string) {
 	<key>NSHighResolutionCapable</key>
 	<true/>
 	<key>CFBundlePackageType</key>
-	<string>APPL</string>
+	<string>BNDL</string>
     {{if .Schemes}}
 	<key>CFBundleURLTypes</key>
 	<array>
@@ -232,6 +232,12 @@ func (b *macBuilder) signProgram(buildInfo *buildInfo, binDest string, name stri
 		return err
 	}
 
+	// If the key is a provisioning profile use the same signing process as iOS
+	if filepath.Ext(buildInfo.key) == ".provisionprofile" {
+		embedded := filepath.Join(binDest, "Contents", "embedded.provisionprofile")
+		return signApple(buildInfo.appID, b.TempDir, embedded, binDest, []string{buildInfo.key})
+	}
+
 	cmd := exec.Command(
 		"codesign",
 		"--deep",