Add a new qGDBServerVersion packet so lldb can query
the name of the remote gdb-protocol server, and get
a version number from it.  This can be useful if lldb
needs to interoperate with a gdb-protocol server with
a known issue or bug.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@191729 91177308-0d34-0410-b5e6-96231b3b80d8