Add jThreadsInfo support to lldb-server

Summary:
This commit adds initial support for the jThreadsInfo packet to lldb-server. The current
implementation does not expedite inferior memory.  I have also added a description of the new
packet to our protocol documentation (mostly taken from Greg's earlier commit message).

Reviewers: clayborg, ovyalov, tberghammer

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D11187

llvm-svn: 242402

lldb/source/Utility/StringExtractorGDBRemote.cpp

@@ -221,7 +221,9 @@ StringExtractorGDBRemote::GetServerPacketType () const
         break;
 
     case 'j':
-        if (PACKET_MATCHES("jSignalInfo")) return eServerPacketType_jSignalsInfo;
+        if (PACKET_MATCHES("jSignalInfo"))                      return eServerPacketType_jSignalsInfo;
+        if (PACKET_MATCHES("jThreadsInfo"))                     return eServerPacketType_jThreadsInfo;
+
 
     case 'v':
             if (PACKET_STARTS_WITH("vFile:"))