1607f0c077
Therefore, we need to cd to ${.CURDIR} before re-invoking ${MAKE} so
that it can find the Makefile.
Also, pass ${MFLAGS} to ${MAKE} so that we pick up the source tree's
makefile fragment, not the host system's fragments, so that this
works properly on older NetBSD host systems, as well in other
cross-compile contexts.