Better error message for invalid argument to --category - silenced the printout of the raw args when not in verbose mode
Better error message for invalid argument to --category - silenced the printout of the raw args when not in verbose mode

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@166514 91177308-0d34-0410-b5e6-96231b3b80d8

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