doc: Document the try server and commit queue
doc: Document the try server and commit queue

Bug: crashpad:162
Change-Id: I9b5dd8c281117c24d79ce6b81269c87d42a21e13
Reviewed-on: https://chromium-review.googlesource.com/452438
Reviewed-by: Sigurður Ásgeirsson <592632e08e8950241f83f5341243136380567d51@chromium.org>
Commit-Queue: Mark Mentovai <f1b5a91d4d6ad523f2610114591c007e75d15084@chromium.org>

chromium/crashpad,atom/crashpad,atom/crashpad,chromium/crashpad,atom/crashpad,chromium/crashpad