K 10
svn:author
V 8
theraven
K 8
svn:date
V 27
2012-01-16T18:19:53.446585Z
K 7
svn:log
V 354
Use the signal fence builtin in stdatomic.h when using the clang atomic
builtins, rather than the __asm hack.  Somehow I missed the existence of this
builtin originally and only noticed that it was there when I went to implement
it...

Note: Trunk clang now has support for (most of) the C[++]11 atomics stuff.
Please test!

Approved by:	brooks (mentor)

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