sed: upgrade to 4.2.2

This pulls upstream sed 4.2.2. It fixes a but when
building with clang fortify.

BUG=chromium:638456
TEST=cbuildbot chromiumos-sdk falco-release

Change-Id: I48cb04ea63ac1ee2bb9759d63e034bc0a4a07fca
Reviewed-on: https://chromium-review.googlesource.com/374042
Commit-Ready: Yunlian Jiang <yunlian@chromium.org>
Tested-by: Yunlian Jiang <yunlian@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
5 files changed