binutils: use same MINIX-specific patch as src/

Work around optarg being undefined.
This patch is likely to be unnecessary when the
_MINIX/_NETBSD_SOURCE/autonconf stuff will be finally sorted out;
on the other hand it should probably be pushed upstream anyway.
binutils: drop DragonFly-specific patches

These were OK against 2.17, but are irrelevant against 2.22.
The upstream source have been adapted in a different way.
binutils: sync with HEAD
binutils: simplify

Drop the MINIX-specific format which was not different from usual ELF
(originally MINIX ELF binutils came from FreeBSD which is slightly
specific, but the differences were about shared libraries, never visible,
and were voided when NetBSD-style ld.so was introduced later.)
binutils: gprof is not built,do not symlink