Add new Queue, QueueItem, Queuelist, SBQueue, SBQueueItem classes to represent
libdispatch aka Grand Central Dispatch (GCD) queues.  Still fleshing out the
documentation and testing of these but the overall API is settling down so it's
a good time to check it in.
<rdar://problem/15600370> 


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@197190 91177308-0d34-0410-b5e6-96231b3b80d8
Fix to only update the offset for concrete registers (ones that don't have 'slice' or 'composite' key/value pairs).



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@197191 91177308-0d34-0410-b5e6-96231b3b80d8