There is no gb_Foo_get_external_target, fix as dtardon told on IRC

solenv/gbuild/ComponentTarget.mk

@@ -64,7 +64,7 @@ $(foreach repo,$(gb_ComponentTarget_REPOS),$(eval $(call gb_ComponentTarget__rul
 $(call gb_ComponentTarget_get_target,%) :
 	$(eval $(call gb_Outpt_error,Unable to find component file $(call gb_ComponentTarget_get_source,,$*) in the repositories: $(gb_ComponentTarget_REPOS) or xsltproc is missing.))
 
-$(call gb_ComponentTarget_get_external_target,%) :
+$(call gb_ComponentTarget_get_outdir_target,%) :
 	$(call gb_Deliver_deliver,$<,$@)
 
 define gb_ComponentTarget_ComponentTarget

solenv/gbuild/RdbTarget.mk

@@ -47,7 +47,7 @@ $(call gb_RdbTarget_get_clean_target,%) :
 	$(call gb_Helper_abbreviate_dirs,\
 		rm -f $(call gb_RdbTarget_get_outdir_target,$*) $(call gb_RdbTarget_get_target,$*))
 
-$(call gb_RdbTarget_get_external_target,%) :
+$(call gb_RdbTarget_get_outdir_target,%) :
 	$(call gb_Deliver_deliver,$<,$@)
 
 define gb_RdbTarget_RdbTarget