Roll libvpx 258445:259973.

- 259973: unbreak iOS simulator build (-mssse3)
- 259953: add a missing file (follow-up to r259946)
- 259946: Disable assembly optimizations in MemorySanitizer builds.
- 259324: disable function level linking when building vp8_asm_enc_offsets.c

BUG=3126
R=wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/10829005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5803 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed