Bug 1063356 - Update libvpx update script. r=kinetik

There have been releases. Bump to the git commit used by the
most recent chrome pull: d95585fb0ec024f6abd96f7b02e0df58019d46af.

This patch contains changes to the update script necessary to
build the new snapshot and removes upstreamed patches.

It's no longer possible to build vp8 and vp9 in the same unified
source file, so most of the vp9 code is moved to standalone sources.
Bug 1063356 - Update libvpx build flags. r=kinetik,ted

Propagate ssse3 and sse4.1 build flags from configure.
This is required by new optimations in upstream commit
d95585fb0ec024f6abd96f7b02e0df58019d46af.
Bug 1063356 - Update libvpx source files. r=kinetik

Results of running update script against libvpx commit
d95585fb0ec024f6abd96f7b02e0df58019d46af