Add --port-file flag to lldb-platform to store port number which platform is listening.
Add --port-file flag to lldb-platform to store port number which platform is listening.

http://reviews.llvm.org/D10886



git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@241479 91177308-0d34-0410-b5e6-96231b3b80d8

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