Add 64-bit MS _Interlocked functions as builtins again

Summary: Previously global 64-bit versions of _Interlocked functions broke buildbots on i386, so now I'm adding them as builtins for x86-64 and ARM only (should they be also on AArch64? I had problems with testing it for AArch64, so I left it)

Reviewers: hans, majnemer, mstorsjo, rnk

Subscribers: cfe-commits, aemerson

Differential Revision: https://reviews.llvm.org/D25576

llvm-svn: 284172