update indigo

* submodules/indigo 5f24e73...cf28cd1 (3):
  > Merge into master from pull request #75: BSN counter stats requests (https://github.com/floodlight/indigo/pull/75)
  > Merge into master from pull request #76: Consume loci and locitest from loxigen-artifacts (https://github.com/floodlight/indigo/pull/76)
  > Merge into master from pull request #74: Update LOCI and fix group fallout (https://github.com/floodlight/indigo/pull/74)
add loxigen-artifacts submodule
update loci

Includes fixes for the 32-bit build.
Merge into master from pull request #82:
update indigo (https://github.com/floodlight/ivs/pull/82)