Move art content to /data

oat tests, gtests, and run-test content to /data/art-test
boot.oat and boot.art to /data/art-cache

Change-Id: I68f9f6798bc4ea0596642ff5624f3e77dec6ccbe
diff --git a/src/dex2oat.cc b/src/dex2oat.cc
index b6a12835..e8cd26d 100644
--- a/src/dex2oat.cc
+++ b/src/dex2oat.cc
@@ -27,12 +27,12 @@
           "\n");
   fprintf(stderr,
           "  --image=<file.art>: specifies the required output image filename.\n"
-          "      Example: --image=/system/framework/boot.art\n"
+          "      Example: --image=/data/art-cache/boot.art\n"
           "\n");
   // TODO: remove this by inferring from --image
   fprintf(stderr,
           "  --oat=<file.oat>: specifies the required oat filename.\n"
-          "      Example: --image=/system/framework/boot.oat\n"
+          "      Example: --image=/data/art-cache/boot.oat\n"
           "\n");
   fprintf(stderr,
           "  --base=<hex-address>: specifies the base address when creating a boot image.\n"
@@ -40,7 +40,7 @@
           "\n");
   fprintf(stderr,
           "  --boot-image=<file.art>: provide the image file for the boot class path.\n"
-          "      Example: --boot-image=/system/framework/boot.art\n"
+          "      Example: --boot-image=/data/art-cache/boot.art\n"
           "\n");
   fprintf(stderr,
           "  --method may be used to limit compilation to a subset of methods.\n"