DO NOT MERGE: test building libvlc.so with outside script

To allow standalone libvlcjni gradle build.

buildsystem/build-libvlcjni.sh

@@ -37,16 +37,12 @@ fi
 # Set up ABI variables
 if [ "${ANDROID_ABI}" = "x86" ] ; then
     TARGET_TUPLE="i686-linux-android"
-    CLANG_PREFIX=${TARGET_TUPLE}
 elif [ "${ANDROID_ABI}" = "x86_64" ] ; then
     TARGET_TUPLE="x86_64-linux-android"
-    CLANG_PREFIX=${TARGET_TUPLE}
 elif [ "${ANDROID_ABI}" = "arm64-v8a" ] ; then
     TARGET_TUPLE="aarch64-linux-android"
-    CLANG_PREFIX=${TARGET_TUPLE}
 elif [ "${ANDROID_ABI}" = "armeabi-v7a" ] ; then
     TARGET_TUPLE="arm-linux-androideabi"
-    CLANG_PREFIX="armv7a-linux-androideabi"
 else
     echo "Please pass the ANDROID ABI to the correct architecture, using
                 compile-libvlc.sh -a ARCH
@@ -88,13 +84,6 @@ fi
 
 VLC_BUILD_DIR="$(cd $VLC_SRC_DIR/; pwd)/build-android-${TARGET_TUPLE}"
 
-if [ -z $VLC_TARBALLS ]; then
-    VLC_TARBALLS="$(cd $VLC_SRC_DIR/;pwd)/contrib/tarballs"
-fi
-if [ ! -d $VLC_TARBALLS ]; then
-    mkdir -p $VLC_TARBALLS
-fi
-
 VLC_OUT_PATH="$VLC_BUILD_DIR/ndk"
 mkdir -p $VLC_OUT_PATH