update for bazel 0.6.0 (#1382)
update for bazel 0.6.0 (#1382)

* bazel: update to latest rules_go

with the update to bazel 0.6.0, there were pilot build failures due to
syntax in the commit of rules_go used. This updates to latest master.

Signed-off-by: Vincent Batts <d01a4772f0cffd3f005a7d7f01c59cd104c7a5fe@hashbangbash.com>

* bazel: rearrange for 0.6.0 ordering

With updating to bazel 0.6.0, no git_repository can be done after
load().

Signed-off-by: Vincent Batts <d01a4772f0cffd3f005a7d7f01c59cd104c7a5fe@hashbangbash.com>

istio/old_pilot_repo,vadimeisenbergibm/pilot,vadimeisenbergibm/pilot,vadimeisenbergibm/pilot,istio/old_pilot_repo,istio/old_pilot_repo