[Bug target/53383] Allow -mpreferred-stack-boundary=3 on x86-64

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-05-18
     Ever Confirmed|0                           |1