rescue: Restore 'make depend' call to fix WITH_META_MODE after r334008.

The rescue/crunchgen build avoids linking binaries for the objects it is
building by doing 'make foo.o bar.o' rather than 'make all'.  This breaks the
implicit 'beforebuild: depend' dependency which ensured that all source files
were generated and up-to-date before building the object files.  This
manifested as a WITH_META_MODE build problem for bin/sh in the rescue build
with syntax.{c,h} not properly being regenerated or recognized as changed in
the dependency graph.

Sponsored by:	Dell EMC
MFC after:	1 week
Reported by:	many

share/mk/bsd.crunchgen.mk

@@ -122,10 +122,8 @@ ${OUTPUTS}: ${CONF}
 	    ${CRUNCHGEN} -fq -m ${OUTMK} -c ${OUTC} ${CONF}
 	# Avoid redundantly calling 'make objs' which we've done by our
 	# own dependencies.
-	# Also avoid unneeded 'make depend' call.
 	sed -i '' \
 	    -e "s/^\(${PROG}:.*\) \$$(SUBMAKE_TARGETS)/\1/" \
-	    -e '/$$(CRUNCHMAKE) $$(BUILDOPTS).* \<depend\> &&.*/d' \
 	    ${OUTMK}
 
 # These 2 targets cannot use .MAKE since they depend on the generated