Update sample to use new perlin noise shader, and make cloud like

experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.cpp

Index: experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.cpp
diff --git a/experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.cpp b/experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.cpp
index b0d1812951f253a26df9bf49fb4a081d50485542..62213cf2f1f80d691ae3ff345d6a2a98ccc405a0 100644
--- a/experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.cpp
+++ b/experimental/SkPerlinNoiseShader2/SkPerlinNoiseShader2.cpp
@@ -1292,11 +1292,11 @@ void GrGLImprovedPerlinNoise::emitCode(EmitArgs& args) {
     fsBuilder->codeAppendf("vec2 coords = %s * %s;", vCoords.c_str(), baseFrequencyUni);
     fsBuilder->codeAppendf("float r = %s(vec3(coords, %s), %s);", noiseOctavesFuncName.c_str(), 
                            zUni, octavesUni);
-    fsBuilder->codeAppendf("float g = %s(vec3(coords, %s + 1000.0), %s);", 
+    fsBuilder->codeAppendf("float g = %s(vec3(coords, %s + 0000.0), %s);", 
                            noiseOctavesFuncName.c_str(), zUni, octavesUni);
-    fsBuilder->codeAppendf("float b = %s(vec3(coords, %s + 2000.0), %s);", 
+    fsBuilder->codeAppendf("float b = %s(vec3(coords, %s + 0000.0), %s);", 
                            noiseOctavesFuncName.c_str(), zUni, octavesUni);
-    fsBuilder->codeAppendf("float a = %s(vec3(coords, %s + 3000.0), %s);", 
+    fsBuilder->codeAppendf("float a = %s(vec3(coords, %s + 0000.0), %s);", 
                            noiseOctavesFuncName.c_str(), zUni, octavesUni);
     fsBuilder->codeAppendf("%s = vec4(r, g, b, a);", args.fOutputColor);