Bump cipd client to 1.7.1

e130567e [cipd] Add spacers to help text to make it more readable.
91b1bda5 [cipd] Enable package name templates for all CLI functions
a10ef48a [cipd] Move template expansion code to common.
4c613c75 cipd: Support template expansion in @subdir
3847616b Rename github.com/luci/{luci-go,gae} to go.chromium.org/{luci,gae}.

R=vadimsh@chromium.org

Bug: 756288
Change-Id: Ie40daf2d80ea715fb303eb199b6c5abf8b4870ef
Reviewed-on: https://chromium-review.googlesource.com/619966Reviewed-by: Vadim Shtayura <vadimsh@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

cipd_client_version

-git_revision:b482bfa19d3fa79b4b40dd5ac7a34479052e3df1
+git_revision:cf5b0de14e94b06274d15e84b19449f580576e80