Fix the build: add a few more G_GINT64_MODIFIER's when printing 64-bit numbers.

Also use %u instead of %d for these unsigned numbers.

Change-Id: I3d1df3bdcc3c68193b49ba8daf1dc56171356290
Reviewed-on: https://code.wireshark.org/review/3266
Reviewed-by: Jeff Morriss <jeff.morriss.ws@gmail.com>