multimedia/libvpx: update 1.6.0
ABI is incompatible... or not? SONAME has changed but the removed vp10
symbols weren't actually exposed (and still aren't).
Note, FreeBSD 9.x now builds with Clang 3.4 because GCC 4.2 fails:
vp9/encoder/x86/vp9_frame_scale_ssse3.c: In function 'eight_tap_row_ssse3': vp9/encoder/x86/vp9_frame_scale_ssse3.c:93: internal compiler error: in simplify_binary_operation_1, at simplify-rtx.c:2563 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions.
Changes: https://chromium.googlesource.com/webm/libvpx/+log/v1.5.0..v1.6.0
ACC report: https://people.freebsd.org/~jbeich/compat_reports/libvpx/1.5.0_to_1.6.0/compat_report.html