Don't do these for Android and iOS for now

Again, must of the rest of the stuff here probably doesn't make sense
for Android or iOS either, but at least it compiles. (It won't get
linked into an app anyway, so just a small waste of time to have it
compiled.)

Change-Id: I32f56a11312c6a3b5eba00d2db8f0a43dd0752e0

extensions/Module_extensions.mk

@@ -31,10 +31,11 @@ $(eval $(call gb_Module_add_targets,extensions,\
 	AllLangResTarget_abp \
 	AllLangResTarget_scn \
 	AllLangResTarget_upd \
-	Library_abp \
-	Library_log \
 	Library_res \
-	Library_scn \
+	$(if $(filter IOS ANDROID,$(OS)),, \
+		Library_abp \
+		Library_log \
+		Library_scn) \
 ))
 
 ifneq ($(filter-out IOS ANDROID,$(OS)),)