Add multibuild dependencies to media/libav
media/libav> Make configure a multibuild phase
media/libav correct syntax error
Add dev-lang/yasm for multibuild
dev-lang/yasm actually require multibuild
Add media-libs/x264 multilib
media-libs/x264 add multibuild to options
media-libs/x264 don't call configure here
media-libs/x264 multibuild work?
media-libs/x264> Rebuild configure
media-libs/x264 linebreaks
Revert "media-libs/x264 multibuild work?"

This reverts commit 7febf4793259c749b2c0820e054372857bb1cc1c.

Conflicts:
	packages/media-libs/x264/x264.exlib
media-libs/x264 configure with myconf
media/libav use myconf
media/libav manually specify host
media-libav> Don't use econf
media/libav disable test for multilib
ncd> Swap ncd + nothing build orders
ncd don't build anything?
ncd> Add patch to override configure flags