Revert "compile-libvlc.sh: Remove explicit linking to c++abi & libunwind"

This reverts commit 26c7dab9.
It appears to break the build on some platforms & causes runtime issues
on some devices

compile-libvlc.sh

@@ -410,6 +410,7 @@ if [ "${ANDROID_ABI}" = "armeabi-v7a" ];then
     NDK_LIB_UNWIND="-lunwind"
 fi
 
+EXTRA_LDFLAGS="${EXTRA_LDFLAGS} -L${NDK_LIB_DIR} -lc++abi ${NDK_LIB_UNWIND}"
 VLC_LDFLAGS="${EXTRA_LDFLAGS}"
 
 # Release or not?