Exclude META-INF/ from repackaged source jar in snapshot

Prevents the META-INF/MANIFEST.MF file from the source jar from being
copied to the snapshot zip file.

Bug: 143678475
Test: m conscrypt-module-sdk
      manually check contents of generated zip

Change-Id: I6eca1435dfc25b562e49de46b049fa81cf8daf90

sdk/update.go

@@ -30,7 +30,7 @@ var pctx = android.NewPackageContext("android/soong/sdk")
 var (
 	repackageZip = pctx.AndroidStaticRule("SnapshotRepackageZip",
 		blueprint.RuleParams{
-			Command: `${config.Zip2ZipCmd} -i $in -o $out "**/*:$destdir"`,
+			Command: `${config.Zip2ZipCmd} -i $in -o $out -x META-INF/**/* "**/*:$destdir"`,
 			CommandDeps: []string{
 				"${config.Zip2ZipCmd}",
 			},