Implement ASan history threads in SB API

Reviewed at
http://reviews.llvm.org/D5219
and
http://lists.cs.uiuc.edu/pipermail/lldb-commits/Week-of-Mon-20140901/012809.html

llvm-svn: 217300

lldb/scripts/Python/interface/SBProcess.i

@@ -389,6 +389,9 @@ public:
     const char *
     GetExtendedBacktraceTypeAtIndex (uint32_t idx);
 
+    lldb::SBThreadCollection
+    GetHistoryThreads (addr_t addr);
+
     %pythoncode %{
         def __get_is_alive__(self):
             '''Returns "True" if the process is currently alive, "False" otherwise'''