Add more temporary #ifdef to mtpd, so it can build with both libchrome-180609 and with Chromium r181380+.

BUG=none
TEST=emerge mtpd on ChromeOS, make mtpd on Linux.

Change-Id: I926eaab400f4e1a8a697d374ee96a6c58b5666a0
Reviewed-on: https://gerrit.chromium.org/gerrit/44867
Commit-Queue: Lei Zhang <thestig@chromium.org>
Tested-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Chris Masone <cmasone@chromium.org>
3 files changed