patches: refresh ffmpeg
patches: refresh libav
patches: updated debian i486 build patch
packages: added ugly hack to build gavl

gavl refuses to check for CLOCK_MONOTONIC when cross compiling
we assume it as usable since winpthreads has it
packages: disabled openmp in libsoxr
patches: refreshed libav, added freetype2 hack fix
patches: refreshed ffmpeg, added freetype2 hack fix
packages: updated freetype2 to 2.5.1