Use unsupported device error message for SMB1

- Use more descriptive error message than the generic failure message when
failing to mount an SMB share because it is SMB1, which is unsupported.


Bug: chromium:757625
Change-Id: I8293ce065293172cd3faacab7fac304908069f09
Reviewed-on: https://chromium-review.googlesource.com/1196009
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587840}
1 file changed