buildsys: Fix error on config clean in realclean

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Makefile.in

@@ -174,6 +174,7 @@ HEADERCLEAN_common:
 headers_clean-y += HEADERCLEAN_common
 HEADERCLEAN_config:
 	$(do_rm) -r $(addprefix $(top_builddir)include/,config generated)
+menuconfig-clean-y: HEADERCLEAN_config
 
 # The headers. Arch specific headers are specified via ARCH_HEADERS in
 # libc/sysdeps/linux/$(TARGET_ARCH)/Makefile.arch which appends those via

Makerules

@@ -488,7 +488,7 @@ files.dep := $(libc-a-y) $(libc-so-y) $(libc-nonshared-y) \
 FORCE:
 
 clean: objclean-y headers_clean-y
-realclean: clean HEADERCLEAN_config menuconfig-clean-y
+realclean: clean menuconfig-clean-y
 	$(Q)$(RM) $(.depends.dep)
 
 objclean-y: $(objclean-y)