Fix a comment typo in init_process_reaper.cc
Fix a comment typo in init_process_reaper.cc

This CL fixes a typo in comment in init_process_reaper.cc. In
CreateInitProcessReaper, the comment told us about exiting with the same
error code as our parent but here was meant an our child.

BUG=
TEST=
R=jln@chromium.org,jorgelo@chromium.org,mdempsky@chromium.org

Review URL: https://codereview.chromium.org/1286093003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#349381}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk