cmd/retrybuild: fix build

Change-Id: Ie304270d9d708dec32f6a244167fa392f9c16c14
Reviewed-on: https://go-review.googlesource.com/14581
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/cmd/retrybuilds/retrybuilds.go b/cmd/retrybuilds/retrybuilds.go
index d4f8689..7ce3f21 100644
--- a/cmd/retrybuilds/retrybuilds.go
+++ b/cmd/retrybuilds/retrybuilds.go
@@ -118,7 +118,7 @@
 	if strings.HasPrefix(failLog, "timed out after ") {
 		return true
 	}
-	if strings.HasPrefix(faillog, "Failed to schedule ") {
+	if strings.HasPrefix(failLog, "Failed to schedule ") {
 		return true
 	}
 	for _, phrase := range flakePhrases {