Fixes PR pkg/6026.
Modified slightly by me, to add NetBSD RCS Ids to patches, along with
a minimalist comment about each patch, and also modified the top-level
Makefile to use mkdir, rather than install -d (install -d was
clobbering directory permissions on ${PREFIX}/{bin,lib,include}).
packages collection. This is based on the 1998/05/16 version of f2c,
and was submitted by Dan McMahill in PR pkg/5735. I modified some patches
to contain the correct pathnames.
