are now included according to the cross-architecture support required,
default the BINDIR for i386 to /usr/libexec/elf here instead of in
all the i386 specific makefiles. For all other architectures, BINDIR
is just /usr/bin.
This finishes up the binutils import. But I am leaving it disabled
in "src/gnu/usr.bin/Makefile" for now. It is not used by anything
yet, so I'll take this opportunity to run one more round of tests
before enabling it.