refactor(builder): Add message to SapUiDefineCall TypeError

The TypeError thrown when a sap.ui.define dependency element is not a
string literal had no message, leaving no context when the build failed
on malformed input.

Author: RandomByte

packages/builder/lib/lbt/calls/SapUiDefine.js

@@ -39,7 +39,7 @@ class SapUiDefineCall {
 			this.dependencies = this.dependencyArray.elements.map( (elem) => {
 				const value = getStringValue(elem);
 				if ( !value ) {
-					throw new TypeError();
+					throw new TypeError(`dependency element is not a string literal in module ${this.name}`);
 				}
 				return resolveRelativeRequireJSName(this.name, value);
 			});