move helpfiles pattern rule above the plaing get_target one

as mac's make might pick the one without the dependency on the direcotry
when trying to "make" that <module>.helpfiles target

Change-Id: I60a55be118bc9a41352dad94326247b02aef1dd6
Reviewed-on: https://gerrit.libreoffice.org/56960
Tested-by: Jenkins
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>

solenv/gbuild/AllLangHelp.mk

@@ -18,6 +18,12 @@ gb_AllLangHelp_AUXDIR := $(gb_AllLangHelp_HELPDIR)/$(gb_AllLangHelp_AUXDIRNAME)
 
 gb_AllLangHelp__get_helpname = $(1)/$(2)
 
+ifneq ($(ENABLE_HTMLHELP),)
+$(call gb_AllLangHelp_get_helpfiles_target,%): | \
+        $(dir $(call gb_AllLangHelp_get_helpfiles_target,%)).dir
+	touch $@
+endif
+
 $(dir $(call gb_AllLangHelp_get_target,%)).dir :
 	$(if $(wildcard $(dir $@)),,mkdir -p $(dir $@))
 
@@ -93,12 +99,6 @@ endif
 
 endef
 
-ifneq ($(ENABLE_HTMLHELP),)
-$(call gb_AllLangHelp_get_helpfiles_target,%): | \
-        $(dir $(call gb_AllLangHelp_get_helpfiles_target,%)).dir
-	touch $@
-endif
-
 # Add additional localized file(s) to the help pack.
 #
 # gb_AllLangHelp_add_localized_files module basedir file(s)