Mark convex_poly_clip as flaky on msaa16/win8 bots. Add more tests to ignored_tests.txt after GPU rect change.

BUG=skia:

Review URL: https://codereview.chromium.org/460023002
diff --git a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json
index 2783d48..a78c8d0 100644
--- a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json
+++ b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json
@@ -6355,6 +6355,10 @@
           8627394447232319577
         ]
       ], 
+      "bugs": [
+        2824
+      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "convex_poly_clip_nvprmsaa4.png": {
diff --git a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Release/expected-results.json b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Release/expected-results.json
index c70c26e..28045e8 100644
--- a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Release/expected-results.json
+++ b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Release/expected-results.json
@@ -6352,9 +6352,13 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          8627394447232319577
+          17868394612177611310
         ]
       ], 
+      "bugs": [
+        2824
+      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "convex_poly_clip_nvprmsaa4.png": {
diff --git a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json
index 3ef0706..c97d48e 100644
--- a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json
+++ b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Debug/expected-results.json
@@ -6352,9 +6352,13 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          8627394447232319577
+          17868394612177611310
         ]
       ], 
+      "bugs": [
+        2824
+      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "convex_poly_clip_nvprmsaa4.png": {
diff --git a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Release/expected-results.json b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Release/expected-results.json
index 4342338..23665f7 100644
--- a/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Release/expected-results.json
+++ b/expectations/gm/Test-Win8-ShuttleA-GTX660-x86_64-Release/expected-results.json
@@ -6355,6 +6355,10 @@
           8627394447232319577
         ]
       ], 
+      "bugs": [
+        2824
+      ], 
+      "ignore-failure": true, 
       "reviewed-by-human": true
     }, 
     "convex_poly_clip_nvprmsaa4.png": {
diff --git a/expectations/gm/ignored-tests.txt b/expectations/gm/ignored-tests.txt
index a8ba024..226482c 100644
--- a/expectations/gm/ignored-tests.txt
+++ b/expectations/gm/ignored-tests.txt
@@ -49,3 +49,13 @@
 gradients_2pt_conical_edge
 gradients_2pt_conical_outside
 gradients_no_texture
+srcmode
+aaclip
+clamped_gradients
+shadows
+bigmatrix
+bigblurs
+circles
+simpleaaclip_rect
+complexclip2_rect_aa
+