Increment branch build number on stabilize branch.
Increment branch build number on stabilize branch.

BUG=chromium-os:24375
TEST=Unit tests.

Change-Id: Iab1886bfd672d24a01c64f47541e0cffc3e81ce6
Reviewed-on: https://gerrit.chromium.org/gerrit/13128
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Tested-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
(cherry picked from commit 042a86d9c2b7965208559ed68225deaac3b51d7e)

chadversary/chromiumos.chromite,zhang0137/chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,coreos/chromite,chadversary/chromiumos.chromite,zhang0137/chromite,coreos/chromite