Adding ViroKit. Needs AWSCore :(

mobile/ios/ViroKit.framework/brdf_vsh.glsl

@@ -0,0 +1,9 @@
+#version 300 es
+layout (location = 0) in highp vec3 position;
+layout (location = 1) in highp vec2 texCoords;
+out highp vec2 v_texcoord;
+
+void main() {
+    v_texcoord = texCoords;
+    gl_Position = vec4(position, 1.0);
+}