win32: Use RtlGenRandom for seeding
win32: Use RtlGenRandom for seeding

Fixes #8.

Signed-off-by: Austin Seipp <48c905ac3851f382b914247d97dd93273d5ff555@pobox.com>

Shimuuar/mwc-random,bos/mwc-random,bos/mwc-random,Shimuuar/mwc-random