Rename art-cache to dalvik-cache

Change-Id: I294995066aecc29fbd739c3e9e6f60934f743064
diff --git a/tools/art b/tools/art
index 2a876a0..4d5fc1f 100755
--- a/tools/art
+++ b/tools/art
@@ -34,7 +34,7 @@
 done
 
 unset ANDROID_PRODUCT_OUT # avoid defaulting dex2oat --host-prefix to target output
-mkdir -p /tmp/android-data/art-cache
+mkdir -p /tmp/android-data/dalvik-cache
 cd $ANDROID_BUILD_TOP
 ANDROID_DATA=/tmp/android-data \
   ANDROID_ROOT=$ANDROID_HOST_OUT \