Fix Build Warning

/bin/bash: line 0: cd: cts/tools/cts-native-xml-generator/src/res: No
such file or directory

Change-Id: Icbde8399cee2853d957a6c52c1d0b231a5962872
diff --git a/tools/cts-native-xml-generator/src/Android.mk b/tools/cts-native-xml-generator/src/Android.mk
index 70b9f49..eb9b921 100644
--- a/tools/cts-native-xml-generator/src/Android.mk
+++ b/tools/cts-native-xml-generator/src/Android.mk
@@ -20,7 +20,6 @@
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
-LOCAL_JAVA_RESOURCE_DIRS := res
 LOCAL_JAR_MANIFEST := MANIFEST.mf
 
 LOCAL_MODULE := cts-native-xml-generator