enable all targets for llvm
guile: update and fix update macro

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
ffmpeg: enable libavresample building

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Delete package libnut

It is buggy and is abandoned by upstream.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Merge pull request #292 from LBg/master

enable all targets for llvm
Merge pull request #293 from TimothyGu/guile

Fix/update guile
Merge pull request #294 from TimothyGu/ffmpeg

ffmpeg: enable libavresample building
Merge pull request #296 from TimothyGu/libnut

Delete package libnut