profiles: arch/arm: Sync up make.defaults with upstream Gentoo

Use the same default profile settings for our arch/arm profile as
upstream Gentoo does as of commit b7acc0779222 ("profiles: remove
ruby stuff from arm, bug #615818"). With this, fix buggy build
environment without $ABI (and other multilib variables) defined on ARM,
which is needed for interoperability with multilib eclasses and ebuilds.

BUG=b:36540057
TEST=build-packages --board=elm

Change-Id: I60e8417cd446dfa2faf9542918f183e1ad6179f5
Reviewed-on: https://chromium-review.googlesource.com/568338
Commit-Ready: Tomasz Figa <tfiga@chromium.org>
Tested-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed