Increase GrGpuGL's program cache size

src/gpu/gl/GrGpuGL.h

Index: src/gpu/gl/GrGpuGL.h
diff --git a/src/gpu/gl/GrGpuGL.h b/src/gpu/gl/GrGpuGL.h
index 600b345c4ddd8b04ee0467be32d13d66a65c3080..6a895750c55566177fc34533120b9857f24889f4 100644
--- a/src/gpu/gl/GrGpuGL.h
+++ b/src/gpu/gl/GrGpuGL.h
@@ -199,7 +199,7 @@ private:
         enum {
             // We may actually have kMaxEntries+1 shaders in the GL context because we create a new
             // shader before evicting from the cache.
-            kMaxEntries = 32,
+            kMaxEntries = 128,
             kHashBits = 6,
         };