gbuild: add target rules for all modules

This allows to run e.g. make UIConfig to automatically run make
UIConfig_<module> for all modules.

Change-Id: Idc2c3a61fd38b486435366164031b4d51f68eebc
Reviewed-on: https://gerrit.libreoffice.org/51274Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

Makefile.in

@@ -165,6 +165,9 @@ gbuild_TARGETS := AllLangHelp \
 $(foreach target,$(gbuild_TARGETS),$(target)_% $(foreach module,$(gbuild_modules),$(target)_$(module)/%)) UIConfig_modules/% %.genpatch: bootstrap fetch
 	$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $@
 
+$(gbuild_TARGETS):
+	$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $@
+
 #
 # Clean
 #

solenv/gbuild/Helper.mk

@@ -88,7 +88,8 @@ endef
 #
 # gb_Helper_make_userfriendly_targets target class build-target? clean-target?
 define gb_Helper_make_userfriendly_targets
-.PHONY: $(2)_$(1) $(2)_$(1).clean
+.PHONY: $(2) $(2)_$(1) $(2)_$(1).clean
+$(2): $(2)_$(1)
 $(2)_$(1) : $(if $(3),$(3),$(call gb_$(2)_get_target,$(1)))
 $(2)_$(1).clean : $(if $(4),$(4),$(call gb_$(2)_get_clean_target,$(1)))