cbuildbot: build arm-generic-full using cros_sdk
cbuildbot: build arm-generic-full using cros_sdk

BUG=none
TEST=trybot with arm-generic-full

Change-Id: I401100681d7babb9a0f9c11df5fd8ba33e4a9277
Reviewed-on: http://gerrit.chromium.org/gerrit/4079
Reviewed-by: Anush Elangovan <be3ea4b32dfea400cfb02e20cf45a400ef235334@chromium.org>
Tested-by: Zdenek Behan <483cf2a9a4e071d4fd973db6a5a78c40f490667c@chromium.org>

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