Remove JILL, JACK_JAR and JILL_JAR

Also ensure that sdk.atree can find jack.jar and jill.jar from prebuilt.

Bug: 27372042
Change-Id: Ie266104e51c09fa21ccb09c1f27ad7068472965c
diff --git a/core/Makefile b/core/Makefile
index a964674..e958074 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2050,6 +2050,7 @@
 			-v "TARGET_CPU_ABI=$(TARGET_CPU_ABI)" \
 			-v "DLL_EXTENSION=$(HOST_SHLIB_SUFFIX)" \
 			-v "FONT_OUT=$(SDK_FONT_TEMP)" \
+			-v "JACK_SDKTOOL_VERSION=$(JACK_SDKTOOL_VERSION)" \
 			-o $(PRIVATE_DIR) && \
 		cp -f $(target_notice_file_txt) \
 				$(PRIVATE_DIR)/system-images/android-$(PLATFORM_VERSION)/$(TARGET_CPU_ABI)/NOTICE.txt && \