Add crash reason extraction to microdump processor

BUG=754715

Change-Id: I00fe62ed06dbbab4c8f6c416d56e2d444be11571
Reviewed-on: https://chromium-review.googlesource.com/621307
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Cr-Mirrored-From: https://chromium.googlesource.com/breakpad/breakpad
Cr-Mirrored-Commit: 2b3be5179e18975b4f12a9ecdf91ea08f3bb9f4b
5 files changed