cbuildbot_config: add x32 profiles
cbuildbot_config: add x32 profiles

BUG=chromium-os:36866
TEST=`cbuildbot_config_unittests.py` passed

Change-Id: Iefbae215e01be13ff469fe3fe50560da93c65e88
Reviewed-on: https://gerrit.chromium.org/gerrit/41261
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Commit-Queue: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Tested-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

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