gogio: set gioui.org/app.ID in addition to the log package's appID

app.ID is documented to be set by the gogio tool, but never was.

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

gogio/build_info.go

@@ -97,6 +97,9 @@ func getLdFlags(appID string) string {
 		ldflags = append(ldflags, strings.Split(extra, " ")...)
 	}
 	// Pass appID along, to be used for logging on platforms like Android.
+	ldflags = append(ldflags, fmt.Sprintf("-X gioui.org/app.ID=%s", appID))
+	// Support earlier Gio versions that had a separate app id recorded.
+	// TODO: delete this in the future.
 	ldflags = append(ldflags, fmt.Sprintf("-X gioui.org/app/internal/log.appID=%s", appID))
 	// Pass along all remaining arguments to the app.
 	if appArgs := flag.Args()[1:]; len(appArgs) > 0 {