lit: Fix two sh lexing bugs.  - '\\\\' inside a "..." string becomes '\\'.  - The '<' token wasn't being recognized.
lit: Fix two sh lexing bugs.
 - '\\\\' inside a "..." string becomes '\\'.
 - The '<' token wasn't being recognized.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@77777 91177308-0d34-0410-b5e6-96231b3b80d8

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