git: re-enable PNaCl build
git: re-enable PNaCl build

The PNaCl issue with large bitfields has now been
fixed in the toolchain.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4024
R=bradnelson@google.com

Review URL: https://codereview.chromium.org/805943004

Schibum/naclports,Schibum/naclports,yeyus/naclports,yeyus/naclports,Schibum/naclports,Schibum/naclports,yeyus/naclports,yeyus/naclports,yeyus/naclports,Schibum/naclports,yeyus/naclports,Schibum/naclports