tidy: Quiet "potential memory leak" warning.

This memory leak warning is a false positive.  The ImportNative object
is added to a list in its constructor, several levels up the
inheritance chain in the constructor for a MythUIType object.

https://clang.llvm.org/docs/analyzer/checkers.html#cplusplus-newdeleteleaks

mythplugins/mytharchive/mytharchive/importnative.cpp

@@ -273,6 +273,9 @@ void ArchiveFileSelector::nextPressed()
         if (native->Create())
             mainStack->AddScreen(native);
     }
+    // No memory leak. ImportNative (via MythUIType) adds the new item
+    // onto the parent mainStack.
+    // NOLINTNEXTLINE(clang-analyzer-cplusplus.NewDeleteLeaks)
 }
 
 void ArchiveFileSelector::prevPressed()