Add more tests to ignore-tests.txt.

Add imagefiltersclipped and imagefiltersscaled to ignored-tests.txt
until they can be rebaselined, since they're failing on Android after
https://codereview.chromium.org/332523006/.

TBR=scroggo
BUG=skia:

Review URL: https://codereview.chromium.org/336663002

expectations/gm/ignored-tests.txt

diff --git a/expectations/gm/ignored-tests.txt b/expectations/gm/ignored-tests.txt
index cccd9bf8..c1bc2ac 100644
--- a/expectations/gm/ignored-tests.txt
+++ b/expectations/gm/ignored-tests.txt
@@ -72,3 +72,5 @@
 # Added by senorblanco for https://codereview.chromium.org/332523006/
 # Needs rebaseline for modified test cases
 perlinnoise
+imagefiltersclipped
+imagefiltersscaled