A couple minor additions to .inc files

[BobC]

I needed a couple additions to two include files, so I am posting them here. I'm not sure if we have a place for MASM64 SDK improvements.

In kernel32.inc, I added GetuserDefaultLocaleName around line 2227.
In win64.inc, I added the full list of LOAD_LIBRARY constants around line 7444. The constants came directly from libloaderapi.h.

Bob