Add a general mechanism to wait on the debugger for Broadcasters of a given class/event bit set.

Use this to allow the lldb Driver to emit notifications for breakpoint modifications.
<rdar://problem/10619974>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@150665 91177308-0d34-0410-b5e6-96231b3b80d8

Author: jimingham

include/lldb/API/SBCommandInterpreter.h

@@ -50,6 +50,9 @@ class SBCommandInterpreter
 
     lldb::SBBroadcaster
     GetBroadcaster ();
+    
+    static const char *
+    GetBroadcasterClass ();
 
     bool
     HasCommands ();

include/lldb/API/SBCommunication.h

@@ -39,6 +39,8 @@ class SBCommunication
 
     lldb::SBBroadcaster
     GetBroadcaster ();
+    
+    static const char *GetBroadcasterClass();
 
     lldb::ConnectionStatus
     AdoptFileDesriptor (int fd, bool owns_fd);