Allow the target to give out the size of the red zone for given ABIs.

A bit of cleanup in the heap module. 

llvm-svn: 174129
diff --git a/lldb/scripts/Python/interface/SBTarget.i b/lldb/scripts/Python/interface/SBTarget.i
index 8d681e8..c4fe24b 100644
--- a/lldb/scripts/Python/interface/SBTarget.i
+++ b/lldb/scripts/Python/interface/SBTarget.i
@@ -712,6 +712,9 @@
     bool
     GetDescription (lldb::SBStream &description, lldb::DescriptionLevel description_level);
     
+    lldb::addr_t
+    GetStackRedZoneSize();
+
     lldb::SBValue
     EvaluateExpression (const char *expr, const lldb::SBExpressionOptions &options);
     %pythoncode %{