MB-9190: Add (u)intX_t for windows

Change-Id: Ia73f4bc977b3b43607e8d5d9d5da92c74b5941e6
Reviewed-on: http://review.couchbase.org/29250
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>
Test building with gcc on win32

Change-Id: Ica2433f6807576c8d469bf47c626c765fbe8c7a0