D1019: logtoprocess: do not use platform.system()

[quark (Jun Wu)]

quark requested review of this revision.
quark added a comment.


  It's changed by https://phab.mercurial-scm.org/D1034.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1019

To: quark, #hg-reviewers, ryanmce
Cc: ryanmce, mercurial-devel