windows: update gtest/gmock paths

The Windows build has rotted a bit with the gtest/gmock updates.
Update all of the paths to fix things up again.

Change-Id: Id67ce76abfd331c0543aa4bd1138e9cc13a18c75
Reviewed-on: https://chromium-review.googlesource.com/441584
Reviewed-by: Mark Mentovai <mark@chromium.org>
Cr-Mirrored-From: https://chromium.googlesource.com/breakpad/breakpad
Cr-Mirrored-Commit: 12f8ca485582f8eba10a9126c99003a42db97db8
6 files changed