devel/libfastcommon: fix misbuild, add DF, bump deps minus nginx-full

The fastcommon library is being built as 32-bit on amd64 due to the
misuse of uname (uname -p returns "amd64", not uname alone).

Additionally, the hardcoded install commands (added via patch) have been
updated to the BSD_INSTALL* macros to satisfy QA tests.

While here, fix building on DragonFly (sacrificing unused Darwin support
in the process).

Finally, bump all ports dependend on fault libfastcommon.so except
www/nginx-full which has no separate PORTREVISION setting. I can't bump
it without bumping www/nginx too (bug??).

Approvd by: just-fix-it