Fix typo in //scripts/common.py.

This was causing the JobQueue to use the wrong default
for whether to run jobs in multiple processes, and slowing
down some of the scripts.

Change-Id: I0d8d6ebd9df5482b9334a0b09d02a5a905a02903
Reviewed-on: https://chromium-review.googlesource.com/c/website/+/3258365
Commit-Queue: Dirk Pranke <dpranke@google.com>
Reviewed-by: Struan Shrimpton <sshrimp@google.com>
diff --git a/scripts/common.py b/scripts/common.py
index 5780139..864f5bf 100644
--- a/scripts/common.py
+++ b/scripts/common.py
@@ -129,7 +129,7 @@
         self.started = set()
         self.finished = set()
         if multiprocess is None:
-            self.multiprocess = (jobs == 1)
+            self.multiprocess = (jobs > 1)
         else:
             self.multiprocess = multiprocess
         if self.multiprocess: