mk/targets.mk: Remove "contrib" from 'CLEANDIRS'.
@@ -5,7 +5,7 @@ DISTFILES_extra= Makefile request-assign-future.txt contrib etc
LISPDIRS = lisp
OTHERDIRS = doc etc
-CLEANDIRS = contrib testing mk
+CLEANDIRS = testing mk
SUBDIRS = $(OTHERDIRS) $(LISPDIRS)
INSTSUB = $(SUBDIRS:%=install-%)
ORG_MAKE_DOC ?= info html pdf