CIWIP

Since relocation issues are now fixed.

Since relocation issues are now fixed.

Since relocation issues are now fixed.

ld: error: /home/tom/work/git/vlc-android/vlc/contrib/aarch64-linux-android/lib/libavcodec.a(videodsp.o):(function ff_prefetch_aarch64: .text+0x10): relocation R_AARCH64_CONDBR19 out of range: 13363404 is not in [-1048576, 1048575]; references ff_prefetch_aarch64
>>> referenced by videodsp.S:26 (libavcodec/aarch64/videodsp.S:26)
>>> defined in /home/tom/work/git/vlc-android/vlc/contrib/aarch64-linux-android/lib/libavcodec.a(videodsp.o)
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

Backport an existing patch from the master branch.

Disable neon_asm since it rely on arm-linux-androideabi-as (removed in
NDK25).

Temporary commit.

 - Fix Android build with NDK25
 - Fix va_list reuse
 - Add aribcc_renderer_set_merge_region_images()
 - Add aribcc_renderer_try_render()

I have absolutely no idea where "lgcc" is added between rav1e/cargo/cargo-c.

It needs the same patch than appleos. Maybe we should check for
aarch64 instead.

execinfo.h is present but not necessary the functions (backtrace())
since it depends on the configured ANDROID_API.

It's not a clean and "upstreamable" patch, but the execinfo code is gone
upstream, so this patch is only temporary.

Cross tools changed from ${ARCH}-linux-android${API}-${TOOL} to
llvm-${TOOL).

Example: aarch64-linux-android21-strings to llvm-strings.

Fix build on Android NDK25, where swab() is a static inline function
defined in <unistd.h>.