Increase version number
Attempt to fix building with clang on Mac

Clang’s emmintrin.h conflicts with some macros defined in texmfmem.h, it
should be fixed in next Clang, but this is a temporary measure to allow
building for now.

Based on:
http://tug.org/pipermail/tlbuild/2013q1/002464.html
Some updates from TeX Live