Add missing titles to few docs to make sure they're rendered in docs.

docs/source/doc/llvm.core.Module.rst

@@ -4,11 +4,13 @@
 | title: Module (llvm.core)   |
 +-----------------------------+
 
+llvm.core.Module
+================
+
 Modules are top-level container objects. You need to create a module
 object first, before you can add global variables, aliases or functions.
 Modules are created using the static method ``Module.new``:
 
-
 .. code-block:: python
 
    #!/usr/bin/env python