refactor(MinerrPass): remove MINERR_ASSERT from source map

Before this commit, the generated source map would
reference the additional file `MINERR_ASSERT`. Now, only
 `angular.js` is referenced.

Author: tbosch

assets/ng-closure-runner.zip

@@ -192,7 +192,9 @@ public void process(Node externs, Node root) {
     }
 
     if (minerrDefNode != null && minerrDefSource != null) {
-      minerrDefNode.getParent().replaceChild(minerrDefNode, createSubstituteMinerrDefinition());
+      Node newMinErrDef = createSubstituteMinerrDefinition();
+      newMinErrDef.useSourceInfoFromForTree(minerrDefNode);
+      minerrDefNode.getParent().replaceChild(minerrDefNode, newMinErrDef);
       codeChanged = true;
     }