Makefile: pass $(CFLAGS) also during dependency generation

When Valgrind is not available NO_VALGRIND is set in CFLAGS, and this
is needed during dependency generation as well as compilation.
Message-Id: <20191210163033.9888-1-emaste@freefall.freebsd.org>

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
1 file changed