Log Message:
Extend the UINT64_C patch to NetBSD, which needs it, and FreeBSD and
OpenBSD too since they probably do but we probably won't hear from
anyone about that directly. PKGREVISION -> 3.

Note that at least on NetBSD __STDC_CONSTANT_MACROS is apparently
already defined here (at least when building graphics/osg, maybe not
always) so this patch may not really be the right approach, but it
works...