Add "target.process.stop-on-shared-library-events" setting, and make it work.

Add the ability to give breakpoints a "kind" string, and have the StopInfoBreakpoint
print that in the brief description if set.  Also print the kind - if set - in the breakpoint
listing.
Give kinds to a bunch of the internal breakpoints.
We were deleting the Mac OS X dynamic loader breakpoint as though the id we had stored away was
a breakpoint site ID, but in fact it was a breakpoint id, so we never actually deleted it.  Fixed that.

llvm-svn: 173555

lldb/source/Target/ThreadPlanRunToAddress.cpp

@@ -93,6 +93,7 @@ ThreadPlanRunToAddress::SetInitialBreakpoints ()
         {
             m_break_ids[i] = breakpoint->GetID();
             breakpoint->SetThreadID(m_thread.GetID());
+            breakpoint->SetBreakpointKind("run-to-address");
         }
     }
 }