erasure-code: update jerasure/gf-complete submodules

erasure-code: update jerasure/gf-complete submodules

jerasure:

git log --no-merges --pretty=%s \
  8fe20c6608385d6a1f38db89aec5cba85ccf04ac..02731df4c1eae1819c4453c9d3ab6d408cadd085
use assert(0) instead of exit(1)

gf-complete:

git log --no-merges --pretty=%s \
  39768c55bb00917691364f6f9f7bf688235aedf8..d384952c68a64d93ac7af6341d5519ea5d2958b9
gitignore: add src/.dirstamp
use assert(0) instead of exit(1)

http://tracker.ceph.com/issues/10216 Fixes: #10216

Signed-off-by: Loic Dachary <ldachary@redhat.com>