First step in getting LLDB ready to support multiple different type systems.

This is the work done by Ryan Brown from http://reviews.llvm.org/D8712 that makes a TypeSystem class and abstracts types to be able to use a type system.

All tests pass on MacOSX and passed on linux the last time this was submitted. 

llvm-svn: 244679

lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.h

@@ -434,10 +434,10 @@ public:
     // PluginInterface protocol
     //------------------------------------------------------------------
     virtual lldb_private::ConstString
-    GetPluginName();
+    GetPluginName() override;
     
     virtual uint32_t
-    GetPluginVersion();
+    GetPluginVersion() override;
 
 protected: