Bug 1400442 - Broaden the annotation for string appending functions to handle more types, r=jonco

--HG--
extra : rebase_source : c55d9900278cf6a31a16567e5ff658306c08e87c

js/src/devtools/rootAnalysis/analyzeHeapWrites.js

@@ -524,8 +524,8 @@ function ignoreContents(entry)
     if (entry.isSafeArgument(2)) {
         var secondArgWhitelist = [
             /nsStringBuffer::ToString/,
-            /AppendUTF8toUTF16/,
-            /AppendASCIItoUTF16/,
+            /AppendUTF\d+toUTF\d+/,
+            /AppendASCIItoUTF\d+/,
         ];
         if (entry.matches(secondArgWhitelist))
             return true;