Add help message for the scenario of using lldb.py module distributed by Xcode4 to invoke the test driver.
Add help message for the scenario of using lldb.py module distributed by Xcode4
to invoke the test driver.


git-svn-id: b33bab8abb5b18c12ee100cd7761ab452d00b2b0@118847 91177308-0d34-0410-b5e6-96231b3b80d8

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