allow to terminate value_string[] with '{0}'

For a long time I was using '{}' to indicate a nulled out struct. But
apparently '{0}' is the favored way to write that. Let's allow using
this notation to terminate a value_string[].

Change-Id: Id2f5ba897ec83f34f8d3c4425353c0baf309bb6d

scripts/verify_value_string_arrays_are_terminated.py

@@ -19,7 +19,7 @@ value_string_array_re = re.compile(
   re.MULTILINE | re.DOTALL)
 
 members = r'(\.(value|str)\s*=\s*)?'
-terminator_re = re.compile('{}|{\s*' + members + '(0|NULL)\s*,'
+terminator_re = re.compile('{\s*}|{\s*0\s*}|{\s*' + members + '(0|NULL)\s*,'
                            '\s*' + members + '(0|NULL)\s*}')
 errors_found = 0