Rebase convex_poly_clip test on Win8 msaa16

BUG=skia:

Review URL: https://codereview.chromium.org/458243002

expectations/gm/Test-Ubuntu13.10-ShuttleA-NoGPU-x86_64-Debug-Recipes/expected-results.json

diff --git a/expectations/gm/Test-Ubuntu13.10-ShuttleA-NoGPU-x86_64-Debug-Recipes/expected-results.json b/expectations/gm/Test-Ubuntu13.10-ShuttleA-NoGPU-x86_64-Debug-Recipes/expected-results.json
index 0967ef4..9e26dfe 100644
--- a/expectations/gm/Test-Ubuntu13.10-ShuttleA-NoGPU-x86_64-Debug-Recipes/expected-results.json
+++ b/expectations/gm/Test-Ubuntu13.10-ShuttleA-NoGPU-x86_64-Debug-Recipes/expected-results.json
@@ -1 +1 @@
-{}
+{}
\ No newline at end of file

expectations/gm/Test-Win8-ShuttleA-GTX660-x86-Debug/expected-results.json

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 be9d5e4..2783d48 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
@@ -6352,7 +6352,7 @@
       "allowed-digests": [
         [
           "bitmap-64bitMD5", 
-          17868394612177611310
+          8627394447232319577
         ]
       ], 
       "reviewed-by-human": true