fix spurious delivery of rdb files (better way)

The only task of the UnoApi class is to deliver a RDB file and all the
stuff related to it (i.e., the IDL files and the generated headers). For
that purpose, order-only dependecies are sufficient.

Change-Id: Ibe0a58d1e8ceaad62ff71773e372fb8dfb921fbd

solenv/gbuild/UnoApi.mk

@@ -40,9 +40,8 @@ $(call gb_UnoApiTarget_set_root,$(1),UCR)
 
 $(call gb_UnoApi_get_target,$(1)) :| $(dir $(call gb_UnoApi_get_target,$(1))).dir
 $(call gb_UnoApi_get_target,$(1)) : $(call gb_UnoApiTarget_get_target,$(1))
-$(call gb_UnoApi_get_target,$(1)) : $(call gb_UnoApiHeadersTarget_get_target,$(1))
-$(call gb_UnoApi_get_target,$(1)) : $(call gb_Package_get_target,$(1)_idl)
-$(call gb_UnoApi_get_target,$(1)) : $(call gb_Package_get_target,$(1)_inc)
+$(call gb_UnoApi_get_target,$(1)) :| $(call gb_Package_get_target,$(1)_idl)
+$(call gb_UnoApi_get_target,$(1)) :| $(call gb_Package_get_target,$(1)_inc)
 $(call gb_UnoApi_get_clean_target,$(1)) : $(call gb_UnoApiTarget_get_clean_target,$(1))
 $(call gb_UnoApi_get_clean_target,$(1)) : $(call gb_UnoApiHeadersTarget_get_clean_target,$(1))
 $(call gb_UnoApi_get_clean_target,$(1)) : $(call gb_Package_get_clean_target,$(1)_idl)