Fix regression in code standard.
Fix regression in code standard.

In I89f6ab96, chromite code was converted to cros_build_lib rather than
a hodge podge mix of cros_lib or cros_build_lib.  This was done to
avoid the semi-frequent occurence of people using the wrong module
name dependent on which module they were working in.

In I88ba60ca, patchset7 conflicted w/ that cleanup work; correct course
of action was to update the new changes to use 'cros_build_lib', not
add a redundant import of cros_build_lib to the old name.

BUG=None
TEST=None

Change-Id: I6f1d04af5c24ab6903705e39f77ee8511ae4d994
Reviewed-on: https://gerrit.chromium.org/gerrit/24348
Commit-Ready: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Tested-by: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>
Reviewed-by: Brian Harring <fdc2d0a2e2340b623587cee5ea8dff425d1eb1f3@chromium.org>

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