smbprovider: Add DeleteEntryOptions protobuf to systemapi

This change adds a protobuf defintion for DeleteEntryOptions
as well as the method name constant for DeleteEntry.

TEST=emerge
BUG=chromium:757625

Change-Id: Ib1a9eaa817fd69ca27c461937217bfe249e4be47
Reviewed-on: https://chromium-review.googlesource.com/868931
Commit-Ready: Bailey Berro <baileyberro@chromium.org>
Tested-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
2 files changed