This updates libvpx to 0.9.7-p1, which is their patched release.
The formula now sets --enable-pic, which seems justified.
The formula now sets --enable-vp8 to include all their vp8 code.
The formula now exposes four options to the user for setting
code coverage, memory tracking, post processing and visiualization.
Their software creates a native static library. Their shared lib
will only build on elf32 atm. This compiles and tests with all
three clang, llvm, and gcc from XCode-4.0.2 on x86_64. This is a
library for handling video in the VPX codec format, related to
webm and Google.
ClosesHomebrew/homebrew#8110.
Signed-off-by: Charlie Sharpsteen <source@sharpsteen.net>