Add gl_SampleMask functionality to fragment builders

src/gpu/glsl/GrGLSL.cpp

Index: src/gpu/glsl/GrGLSL.cpp
diff --git a/src/gpu/glsl/GrGLSL.cpp b/src/gpu/glsl/GrGLSL.cpp
index 2de81ddd60efb85bbe1eefdf205454735910bbe0..bec4784db25fe0eae8d337e5d8a353dd84e5ee8d 100644
--- a/src/gpu/glsl/GrGLSL.cpp
+++ b/src/gpu/glsl/GrGLSL.cpp
@@ -17,7 +17,9 @@ bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration gen) {
         case k140_GrGLSLGeneration:
         case k150_GrGLSLGeneration:
         case k330_GrGLSLGeneration:
+        case k400_GrGLSLGeneration:
         case k310es_GrGLSLGeneration:
+        case k320es_GrGLSLGeneration:
             return true;
     }
     return false;