util/scripts/maintainers.go: Provide delimiters between maintainers

Help automated tools make sense of the output.
Instead of "[name 1 <email> name 2 <email>]", it now prints
"name 1 <email>, name 2 <email>". As long as there are no commas in the
maintainer names, they can be split easily.

Change-Id: I4a254f566404b081a08923bc7ceb49f02039aa2a
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/29604
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/scripts/maintainers.go

@@ -20,6 +20,7 @@ import (
 	"os"
 	"os/exec"
 	"regexp"
+	"strings"
 )
 
 type subsystem struct {
@@ -151,7 +152,7 @@ func find_maintainer(fname string) {
 			success = true
 			fmt.Println(fname, "is in subsystem",
 				subsystem.name)
-			fmt.Println("Maintainers: ", subsystem.maintainer)
+			fmt.Println("Maintainers: ", strings.Join(subsystem.maintainer, ", "))
 		}
 	}
 	if !success {