add gm for srcmode (and clearmode) in prep for optimization work



git-svn-id: http://skia.googlecode.com/svn/trunk/gyp@6429 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gmslides.gypi b/gmslides.gypi
index a5eef80..61b1061 100644
--- a/gmslides.gypi
+++ b/gmslides.gypi
@@ -67,6 +67,7 @@
     '../gm/shadertext3.cpp',
     '../gm/shadows.cpp',
     '../gm/simpleaaclip.cpp',
+    '../gm/srcmode.cpp',
     '../gm/strokefill.cpp',
     '../gm/strokerects.cpp',
     '../gm/strokes.cpp',