Update references to the ART APEX for tests.

Test: art/tools/buildbot-build.sh --host && art/test.py --host --64 --optimizing
Test: art/tools/run-gtests.sh in chroot
Test: art/test/testrunner/testrunner.py --target --64 in chroot
Test: art/tools/run-libcore-tests.sh --mode=device --variant=X64 in chroot
Test: art/tools/run-jdwp-tests.sh --mode=device --variant=X64 in chroot
Bug: 135753770
Change-Id: I876c5a2931970d6a75c1812e0f87bc65ab7bde0f
Merged-In: I876c5a2931970d6a75c1812e0f87bc65ab7bde0f
diff --git a/test/run-test b/test/run-test
index daccd61..218c989 100755
--- a/test/run-test
+++ b/test/run-test
@@ -815,7 +815,7 @@
         echo "                          (/apex/com.android.i18n by default)."
         echo "    --android-runtime-root [path]"
         echo "                          The path on target for the Android Runtime root."
-        echo "                          (/apex/com.android.runtime by default)."
+        echo "                          (/apex/com.android.art by default)."
         echo "    --android-tzdata-root [path]"
         echo "                          The path on target for the Android Time Zone Data root."
         echo "                          (/apex/com.android.tzdata by default)."