n7.1.5
swscale/ppc: Move VSX-using code to its own file
swscale/ppc/swscale_altivec: Simplify macro
swscale/ppc: fix ASAN stack-buffer-overflow in yuv2planeX
swscale/ppc: fix LOAD_FILTER overread in VSX path
lsws/ppc/yuv2rgb_altivec: Fix build in non-VSX environments with Clang
Merge remote-tracking branch 'qatar/master'
sws: rename SwsContext.swscale to convert_unscaled