Revert "Invalidate the file system cache entries for files that may rebuild"
Revert "Invalidate the file system cache entries for files that may rebuild"

This reverts commit r209910, which is breaking some of the bots.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@209911 91177308-0d34-0410-b5e6-96231b3b80d8

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