SkQP: disable 1 test

etc1 test has bad model data.

Change-Id: I9cbc90541d92b9ac35e83c7cd2d1591d8328637e
Reviewed-on: https://skia-review.googlesource.com/c/196648
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/platform_tools/android/apps/skqp/src/main/assets/skqp/rendertests.txt b/platform_tools/android/apps/skqp/src/main/assets/skqp/rendertests.txt
index 6c7cc59..21de017 100644
--- a/platform_tools/android/apps/skqp/src/main/assets/skqp/rendertests.txt
+++ b/platform_tools/android/apps/skqp/src/main/assets/skqp/rendertests.txt
@@ -259,7 +259,7 @@
 encode-srgb-jpg,0
 encode-srgb-png,0
 encode-srgb-webp,0
-etc1,0
+etc1,-1
 extractalpha,0
 extractbitmap,-1
 fadefilter,0