mtpd: prepend mtpd/ to all local includes

Since we're pulling in headers from the gen directory and also
from other packages (system_api), it makes sense to be explicit
about the fact that the other headers are also coming from the
mtpd directory instead of relying on the fact that they are in
the current directory during compilation.

This also allows us to alphabetize the includes better.

BUG=chromium:757584
TEST=emerge-cyan mtpd; FEATURES=test emerge-cyan mtpd

Change-Id: I3837f40961ca1bf6f6e1c6531a5f12188e62cf10
Reviewed-on: https://chromium-review.googlesource.com/625054
Commit-Ready: Eric Caruso <ejcaruso@chromium.org>
Tested-by: Eric Caruso <ejcaruso@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
11 files changed