Workaround for MacOSX build failure with gcc <= 4.4
Workaround for MacOSX build failure with gcc <= 4.4

Summary:
A better solution to http://llvm.org/bugs/show_bug.cgi?id=13777
Named namespace + more unique name to make ODR violations unlikely.

Reviewers: chandlerc, doug.gregor, klimek

Reviewed By: doug.gregor

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D38

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@163513 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang