add GM case nonclosedpaths. The 2 bugs below showed some non-closed paths which are easy to get wrong rendering results. So add a GM case for this kind paths to avoid potential bugs to be introduced.

BUG=skia:1782
BUG=skia:1811
R=bsalomon@google.com, caryclark@google.com, reed@google.com, robertphillips@google.com

Author: yunchao.he@intel.com

Review URL: https://codereview.chromium.org/64173009

git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@12206 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gmslides.gypi b/gmslides.gypi
index a18ad54..542de0f 100644
--- a/gmslides.gypi
+++ b/gmslides.gypi
@@ -91,6 +91,7 @@
     '../gm/morphology.cpp',
     '../gm/nested.cpp',
     '../gm/ninepatchstretch.cpp',
+    '../gm/nonclosedpaths.cpp',
     '../gm/offsetimagefilter.cpp',
     '../gm/optimizations.cpp',
     '../gm/ovals.cpp',