Ignore debug info of jetty-util prebuilt

To workaround a Jack failure, possibly caused by malformed debug info.

Bug: 27242662
(cherry picked from commit d8b7db714ff75c37a6fe5b228a1373e9300022f0)

Change-Id: I82bb302498abcad741a18e42f73cd2331233cc78
diff --git a/Android.mk b/Android.mk
index f7ed668..d4859ec 100644
--- a/Android.mk
+++ b/Android.mk
@@ -48,8 +48,18 @@
 
 LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES := \
 	servlet-api:lib/javax.servlet-3.0.0.v201112011016.jar \
-	jetty-util:lib/jetty-util-6.1.26.jar \
 	slf4j-api:lib/slf4j-api-1.6.1.jar \
 	slf4j-jdk14:lib/slf4j-jdk14-1.6.1.jar \
 
 include $(BUILD_MULTI_PREBUILT)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+LOCAL_MODULE := jetty-util
+LOCAL_SRC_FILES := lib/jetty-util-6.1.26.jar
+LOCAL_JACK_FLAGS := -D jack.import.jar.debug-info=false
+
+include $(BUILD_PREBUILT)
+