Fix typo in archive.py

R=ricow@google.com

Change-Id: If01a94d97aaf6abe2a8bfc36bd7f2bba969513a7
diff --git a/tools/archive.py b/tools/archive.py
index ee6f5ec..3242efc 100755
--- a/tools/archive.py
+++ b/tools/archive.py
@@ -278,7 +278,7 @@
             '-PspdxVersion=' + version,
             '-PspdxRevision=' + GetGitHash()
         ])
-        time.end()
+        timing.end()
 
         # Upload keep-anno javadoc to a fixed "docs" location.
         timing.begin("Uploade keep-anno Javadoc")