Adding ordinal enums to kernel modules.

Access via xe::kernel::modules::xboxkrnl::ordinals::MyFunction
(or just ordinals::MyFunction when in the namespace).
Some collisions occurred - just added random suffixes for now.

src/xenia/kernel/modules/xam/sources.gypi

@@ -5,6 +5,7 @@
     'xam_info.h',
     'xam_module.cc',
     'xam_module.h',
+    'xam_ordinals.h',
     'xam_state.cc',
     'xam_state.h',
     'xam_table.inc',