Change jack/dex target dependency to jack script

Instead of jack.jar.

(cherry picked from commit 1d489a33332baaf434e90a04bded127e855e1850)

Change-Id: I92b4183feb50189a994603f35444ff1bc4872da8
diff --git a/build/build_android_stubs.mk b/build/build_android_stubs.mk
index f74d23c..3b76923 100644
--- a/build/build_android_stubs.mk
+++ b/build/build_android_stubs.mk
@@ -51,5 +51,5 @@
 	$(hide) jar -cf $@ -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) .
 	$(hide) jar -u0f $@ -C $(PRIVATE_CLASS_INTERMEDIATES_DIR) resources.arsc
 
-$(jack_lib) : $(full_target) $(JILL_JAR) $(JACK_JAR)
+$(jack_lib) : $(full_target) $(JILL_JAR) $(JACK)
 	$(transform-jar-to-jack)
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