ART: Strip error message in run-test

It seems the output is flaky - sometimes the LOG(ERROR) makes it
to output.txt, sometimes it doesn't. So instead always strip it.

Change-Id: I409b98eb9a5bf0c2e6c1df16ff3b8013a2a85cc5
diff --git a/test/119-noimage-patchoat/check b/test/119-noimage-patchoat/check
index 7b47ac1..57111bc 100755
--- a/test/119-noimage-patchoat/check
+++ b/test/119-noimage-patchoat/check
@@ -15,6 +15,6 @@
 # limitations under the License.
 
 # Strip the process pids and line numbers from exact error messages.
-sed -e 's/^art E.*\] //' "$2" > "$2.tmp"
+sed -e '/^art E.*\] /d' "$2" > "$2.tmp"
 
 diff --strip-trailing-cr -q "$1" "$2.tmp" >/dev/null
diff --git a/test/119-noimage-patchoat/expected.txt b/test/119-noimage-patchoat/expected.txt
index 3d2b4f1..ed13662 100644
--- a/test/119-noimage-patchoat/expected.txt
+++ b/test/119-noimage-patchoat/expected.txt
@@ -1,7 +1,6 @@
 Run -Xnoimage-dex2oat -Xpatchoat:/system/bin/false
 Has image is false, is image dex2oat enabled is false.
 Run -Xnoimage-dex2oat -Xpatchoat:/system/bin/false -Xno-dex-file-fallback
-Dex file fallback disabled, cannot continue without image.
 Failed to initialize runtime (check log for details)
 Run -Ximage-dex2oat
 Has image is true, is image dex2oat enabled is true.