update infra

* submodules/infra 67f047c...b521bed (7):
  > Merge into master from pull request #11: AIM: mark aim_die noreturn to silence warnings (https://github.com/floodlight/infra/pull/11)
  > Merge into master from pull request #10: Handle enum member strings with hyphen and period characters. (https://github.com/floodlight/infra/pull/10)
  > aim_memory.h now required.
  > Parenthesis required.
  > Merge branch 'master' of github.com:floodlight/infra
  > Allow string name override.
  > Trailing whitespace.
update loxigen-artifacts

* submodules/loxigen-artifacts 1a06b92...5c5ec9b (4):
  > Artifacts from https://github.com/floodlight/loxigen/compare/3f7a89088407ca2a070c6c6043333207ce26105b...deef8efcaed3649848f8132864153d9d221f9a48
  > Artifacts from https://github.com/floodlight/loxigen/compare/0e07efe22ea803cccfba9ecfe5b6f8ee4e568f28...3f7a89088407ca2a070c6c6043333207ce26105b
  > Artifacts from https://github.com/floodlight/loxigen/compare/15f93bedede5c9a64c191b9c9c1413758b422afc...0e07efe22ea803cccfba9ecfe5b6f8ee4e568f28
  > Artifacts from https://github.com/floodlight/loxigen/compare/3fb4e8143e3805a9c124960cf685f8cd136b51d7...15f93bedede5c9a64c191b9c9c1413758b422afc
router_ip_table: generate module
router_ip_table: skeleton gentable ops

Validate key and value but don't do anything with it.
router_ip_table: implement router_ip_lookup
update indigo

* submodules/indigo 20ad4b3...04949e4 (2):
  > Merge into master from pull request #79: gentable infrastructure (https://github.com/floodlight/indigo/pull/79)
  > Merge into master from pull request #80: Automated submodule updates. (https://github.com/floodlight/indigo/pull/80)
router_ip_table: remove > check on error codes
Merge into master from pull request #6:
router_ip_table module (https://github.com/floodlight/switchlight-common/pull/6)