Michael Brown
895d73f383
[build] Clean up all binary directories on "make [very]clean"
Allow a straightforward "make clean" or "make veryclean" to apply to
all binary directories (using the shell pattern "bin{,-*}").
Individual binary directories can be cleaned using e.g.
make bin clean
make bin-x86_64-efi clean
Reported-by: Robin Smidsrød <robin@smidsrod.no>
Signed-off-by: Michael Brown <mcb30@ipxe.org>