Avoid "warning: no newline at end of file" in importlib.h.

Python/freeze_importlib.py

@@ -25,6 +25,8 @@ def main(input_path, output_path):
     with open(output_path, 'w', encoding='utf-8') as output_file:
         output_file.write('\n'.join(lines))
         output_file.write('/* Mercurial binary marker: \x00 */')
+        # Avoid a compiler warning for lack of EOL
+        output_file.write('\n')
 
 
 if __name__ == '__main__':

Python/importlib.h

@@ -3029,4 +3029,4 @@ unsigned char _Py_M__importlib[] = {
     12,17,6,2,12,47,18,25,12,23,12,15,24,30,6,1,
     6,3,12,54,
 };
-/* Mercurial binary marker:  */
+/* Mercurial binary marker:  */