<rdar://problem/11052829>
<rdar://problem/11052829>

Fixed a case where if you have a argument stirng that ends with a '\' character, it would infinite loop while consuming all of your memory.

Also fixed a case where non-quote terminated strings would inefficiently be handled.



git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@152809 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb