util/scripts/maintainers.go: file: queries are more stable with quotes

The gerrit docs aren't very explicit about it, but file:"^foo$" is more
robust than file:^foo$.

Change-Id: I16c7d972d365cd04ca5fbb78012ad4eaad667be6
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/29781
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/scripts/maintainers.go

@@ -278,7 +278,7 @@ func do_print_gerrit_rules() {
 		}
 		fmt.Println("#", subsystem.name)
 		for _, path := range subsystem.paths {
-			fmt.Println("[filter \"file:" + path_to_regexstr(path) + "\"]")
+			fmt.Println("[filter \"file:\\\"" + path_to_regexstr(path) + "\\\"\"]")
 			for _, maint := range subsystem.maintainer {
 				fmt.Println("  reviewer =", extract_maintainer(maint))
 			}