Add peach_pit builder config
Add peach_pit builder config

BUG=None
TEST=manual
     . made sure unittest still passes:

     $ ./buildbot/cbuildbot_config_unittest.py

    .  trybot for peach-paladin completed successfully.

Change-Id: If3a4bdbd7cc601e7abdab5a0dfaf911351cf89aa
Signed-off-by: Vadim Bendebury <5515d6d2d0829cbe0dd0dcf2094aaded06d58514@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/46886
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Commit-Queue: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>

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