Use pkgs/pseudo/stage to run mtree against STAGE_OBJTOP

pkgs/pseudo/stage/Makefile

@@ -0,0 +1,17 @@
+# $FreeBSD$
+
+# this makefile gets hooked into everyone's dependencies so that
+# distrib-dirs can be done in STAGE_OBJTOP
+all:
+
+# mtree makes a lot of noise if we are not root, 
+# we don't need to see it.
+stage-distrib-dirs: .META
+	mkdir -p ${STAGE_OBJTOP}
+	${.MAKE} -C ${SRCTOP}/etc distrib-dirs DESTDIR=${STAGE_OBJTOP} > $@
+
+.include <bsd.prog.mk>
+
+.if ${.MAKE.LEVEL} > 0 && ${MK_STAGING} == "yes"
+all: stage-distrib-dirs
+.endif

share/mk/local.dirdeps.mk

@@ -13,3 +13,8 @@ DIRDEPS_FILTER+= \
 .if ${MK_SSP:Uno} != "no" && defined(PROG)
 DIRDEPS += gnu/lib/libssp/libssp_nonshared
 .endif
+
+# we need pkgs/pseudo/stage to prep the stage tree
+.if ${DEP_RELDIR:U${RELDIR}} != "pkgs/pseudo/stage"
+DIRDEPS += pkgs/pseudo/stage
+.endif