If we're dealing with an overridden buffer in the AST reader, load the file as a virtual file with the stored modification time and size.
If we're dealing with an overridden buffer in the AST reader, load the
file as a virtual file with the stored modification time and size.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@144916 91177308-0d34-0410-b5e6-96231b3b80d8

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