mk: Attempt to silence "Nothing to be done for xx" messages.

When rebuilding, it's not really useful to see reams of "Nothing to be done for" for every application being built. This change attempts to silence these messages.

Application.mk

@@ -106,6 +106,7 @@ VPATH += :.
 # Targets follow
 
 all:: $(OBJS)
+	@:
 .PHONY: clean depend distclean
 .PRECIOUS: $(BIN)
 
@@ -198,6 +199,7 @@ endif
 	$(eval PROGOBJ=$(filter-out $(firstword $(PROGOBJ)),$(PROGOBJ)))
 
 install:: $(PROGLIST)
+	@:
 
 else
 
@@ -226,10 +228,12 @@ $(MAINZIGOBJ): %$(ZIGEXT)$(SUFFIX)$(OBJEXT): %$(ZIGEXT)
 		$(call ELFCOMPILEZIG, $<, $@), $(call COMPILEZIG, $<, $@))
 
 install::
+	@:
 
 endif # BUILD_MODULE
 
 context::
+	@:
 
 ifneq ($(PROGNAME),)
 
@@ -243,8 +247,10 @@ $(REGLIST): $(DEPCONFIG) Makefile
 	$(if $(filter-out $(firstword $(STACKSIZE)),$(STACKSIZE)),$(eval STACKSIZE=$(filter-out $(firstword $(STACKSIZE)),$(STACKSIZE))))
 
 register:: $(REGLIST)
+	@:
 else
 register::
+	@:
 endif
 
 .depend: Makefile $(wildcard $(foreach SRC, $(SRCS), $(addsuffix /$(SRC), $(subst :, ,$(VPATH))))) $(DEPCONFIG)
@@ -254,6 +260,7 @@ endif
 	$(Q) touch $@
 
 depend:: .depend
+	@:
 
 clean::
 	$(call CLEAN)

Directory.mk

@@ -51,6 +51,7 @@ endif
 	$(Q) touch .kconfig
 
 clean: $(foreach SDIR, $(CLEANSUBDIRS), $(SDIR)_clean)
+	@:
 
 distclean: $(foreach SDIR, $(CLEANSUBDIRS), $(SDIR)_distclean)
 ifneq ($(MENUDESC),)