build: Fix unit tests built go tip
build: Fix unit tests built go tip

Unit tests in go version devel +e3f3ade are failing
because URL does not match.

Fix match with the needed prefix given in tip.

Fixes: #115

Signed-off-by: Jose Carlos Venegas Munoz <821ab150128e889cb3ad9aab6e72689fd9ad26f2@intel.com>

clearcontainers/proxy,clearcontainers/proxy