Switch nacl-clang back to gas in SCons

Also re-enable nacl_clang tests which were disabled because of assembler
issues.

R=jvoung@chromium.org
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3966
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3969

Review URL: https://codereview.chromium.org/778483002

git-svn-id: svn://svn.chromium.org/native_client/trunk/src/native_client/site_scons@14164 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2
1 file changed
tree: c0a6f6ebf96fe069b6bbc559052ee128022f9fd9
  1. site_tools/
  2. gyp_extract.py
  3. site_init.py
  4. usage_log.py