compile-medialibrary: Ensure releases are using a medialib tag

buildsystem/compile-medialibrary.sh

@@ -136,6 +136,11 @@ fi
 
 cd ${MEDIALIBRARY_BUILD_DIR}
 
+if [ "$RELEASE" = "0" ]; then
+    git describe --exact-match --tags ${MEDIALIBRARY_HASH} > /dev/null || \
+        avlc_checkfail "Release builds must use tags"
+fi
+
 if [ ! -d "build-android-$ANDROID_ABI/" -o ! -f "build-android-$ANDROID_ABI/build.ninja" ]; then
     PKG_CONFIG_LIBDIR="$SRC_DIR/vlc/build-android-${TARGET_TUPLE}/install/lib/pkgconfig" \
     PKG_CONFIG_PATH="$SRC_DIR/medialibrary/prefix/${TARGET_TUPLE}/lib/pkgconfig:$SRC_DIR/vlc/contrib/$TARGET_TUPLE/lib/pkgconfig/" \