[Bug middle-end/21743] Enable __builtin_clog

[mmitchel at gcc dot gnu dot org]

-- 
Bug 21743 depends on bug 21784, which changed state.

Bug 21784 Summary: [3.4/4.0/4.1 Regression] Using vs builtin names
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21784

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
             Status|NEW                         |ASSIGNED
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21743