Inject material name into shader

Author: WestLangley

src/renderers/webgl-fallback/nodes/GLSLNodeBuilder.js

@@ -773,6 +773,10 @@ ${vars}
 
 		return `#version 300 es
 
+${ this.getSignature() }
+
+// ${ this.material.name }
+
 // extensions 
 ${shaderData.extensions}
 
@@ -815,6 +819,8 @@ void main() {
 
 ${ this.getSignature() }
 
+// ${ this.material.name }
+
 // precision
 ${ defaultPrecisions }