Adding ViroKit. Needs AWSCore :(

mobile/ios/ViroKit.framework/equirect_to_cube_vsh.glsl

@@ -0,0 +1,12 @@
+#version 300 es
+
+in vec3 position;
+out vec3 v_world_position;
+
+uniform mat4 projection_matrix;
+uniform mat4 view_matrix;
+
+void main() {
+    v_world_position = position;
+	gl_Position = projection_matrix * view_matrix * vec4(position, 1.0);
+}