clang: Fix typo in comment
clang: Fix typo in comment

(Sorry for all these commits; trying to sort out why svn doesn't want to store
my password.)

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@369540 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang