Bug in atomicIncrement implementation for MIPS GCC
https://bugs.webkit.org/show_bug.cgi?id=110969

Patch by Balazs Kilvady <kilvadyb@homejinni.com> on 2013-02-27
Reviewed by Csaba Osztrogonác.

Fix of __sync_[add|sub]_and_fetch_8 for GCC patch.

* wtf/Atomics.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144174 268f45cc-cd09-0410-ab3c-d52691b4dbfc