client: fix link bug
client: fix link bug

Change-Id: Icc5b64f0c2d2cae1db5190989d35a374f56f6644
Reviewed-on: https://upspin-review.googlesource.com/2649
Reviewed-by: Rob Pike <4dc7c9ec434ed06502767136789763ec11d2c4b7@google.com>

upspin/upspin,upspin/upspin