Exempt smoketest.jar from "non-cross-compiling only"

...just like it was implicitly exempted while it was still part of juh.jar.
(The true fix should be to remove this smoketest-support code from general
installation sets, but that is left as an exercise for another day.)

Change-Id: Ia8bb07795facef5f344e3e53c3901f229725d1af

smoketest/Module_smoketest.mk

@@ -23,7 +23,6 @@ ifneq ($(SOLAR_JAVA),)
 $(eval $(call gb_Module_add_targets,smoketest,\
 	Extension_TestExtension \
 	Jar_TestExtension \
-	Jar_smoketest \
 ))
 endif
 
@@ -39,4 +38,10 @@ $(eval $(call gb_Module_add_subsequentcheck_targets,smoketest,\
 
 endif
 
+ifneq ($(SOLAR_JAVA),)
+$(eval $(call gb_Module_add_targets,smoketest,\
+	Jar_smoketest \
+))
+endif
+
 # vim: set noet sw=4 ts=4: