Fix sys.types definitions for Linux X32.
Change memcpy, memmove, and memset to pure
Also change some strxxx functions to pure
Fix sys.stat stat_t layout for Linux X32
Merge pull request #515 from 9rnsr/fix_pure

Change memcpy, memmove, and memset to pure
Merge pull request #514 from ibuclaw/x32arch2

Fix sys.types and sys.stat for Linux X32.