changing timer for siab build

Change-Id: Icb1332f53e1b0b071f2fa103cd65220d9bbc42a6
diff --git a/jjb/siab.yaml b/jjb/siab.yaml
index 33768d8..9be9b67 100644
--- a/jjb/siab.yaml
+++ b/jjb/siab.yaml
@@ -42,4 +42,4 @@
     triggers:
        - timed: |
                  TZ=America/Los_Angeles
-                 H */4 * * *
+                 H * * * *