Rename art script module to art-script.

Otherwise it confuses the build system.

bug: 64554602
Test: build system image with SOONG_ALLOW_MISSING_DEPENDENCIES=true,
      and no art script.

Change-Id: I683d35d5079ab66d7f498f716d40eace8853d184
diff --git a/tools/Android.mk b/tools/Android.mk
index bc2fd8c..9ecf0cd 100644
--- a/tools/Android.mk
+++ b/tools/Android.mk
@@ -20,13 +20,15 @@
 include $(CLEAR_VARS)
 LOCAL_IS_HOST_MODULE := true
 LOCAL_MODULE_CLASS := EXECUTABLES
-LOCAL_MODULE := art
+LOCAL_MODULE := art-script
 LOCAL_SRC_FILES := art
+LOCAL_MODULE_STEM := art
 include $(BUILD_PREBUILT)
 
 # Copy the art shell script to the target's bin directory
 include $(CLEAR_VARS)
 LOCAL_MODULE_CLASS := EXECUTABLES
-LOCAL_MODULE := art
+LOCAL_MODULE := art-script
 LOCAL_SRC_FILES := art
+LOCAL_MODULE_STEM := art
 include $(BUILD_PREBUILT)