Prototype cros_build_packages, which builds and extracts build tarballs.
Prototype cros_build_packages, which builds and extracts build tarballs.

Usage: cros_build_packages [options]

Options:
  -h, --help       show this help message and exit
  --board=BOARD    The board to build packages for.
  --debug          Include debug symbols.
  --nowithdev      Don't build useful developer friendly utilities.
  --nowithtest     Build packages required for testing.
  --nowithfactory  Build factory installer
  --nousepkg       Don't use binary packages.
  --nousetarball   Don't use tarball.
  --nofast         Don't merge packages in parallel.

BUG=chromium-os:6604
TEST=Ran cros_build_packages and ./cros_build_packages --nousetarball

Review URL: http://codereview.chromium.org/3315020

Change-Id: Ida9ed6375c2ce4acde304bd3f2796b4419f1d376

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