Revert "Adjust Subzero CMAKE=1 build to also use libc++ (like autoconf)."

This reverts commit d8fb3d33f38258b7fb177bd4cb420fab2e0c2c3a.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4138

Review URL: https://codereview.chromium.org/1091123002
1 file changed