[Bug bootstrap/53188] [4.8 Regression] libatomic error: Please use exactly Autoconf 2.64 instead of 2.69

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53188

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-02 
16:56:09 UTC ---
>./contrib/gcc_update for svn trees,

it also works correctly for git trees too.