Ignore asterix-opt
Ignore asterix-opt

This change adds asterix-opt to gitignore in order to not push
extension development code into the apache asterixdb repository

Change-Id: I5199c8c0d166ef5e5ed70b541e0b96e485801d68
Reviewed-on: https://asterix-gerrit.ics.uci.edu/903
Reviewed-by: Till Westmann <6a75d5097ecd0c0c685f0a2e96aeb5f14c655645@apache.org>
Reviewed-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@fulliautomatix.ics.uci.edu>

ty1er/incubator-asterixdb,ty1er/incubator-asterixdb,ecarm002/incubator-asterixdb,apache/incubator-asterixdb,heriram/incubator-asterixdb,waans11/incubator-asterixdb,ecarm002/incubator-asterixdb,waans11/incubator-asterixdb,ty1er/incubator-asterixdb,waans11/incubator-asterixdb,heriram/incubator-asterixdb,apache/incubator-asterixdb,heriram/incubator-asterixdb,ty1er/incubator-asterixdb,waans11/incubator-asterixdb,heriram/incubator-asterixdb,apache/incubator-asterixdb,waans11/incubator-asterixdb,heriram/incubator-asterixdb,ecarm002/incubator-asterixdb,apache/incubator-asterixdb,ecarm002/incubator-asterixdb,heriram/incubator-asterixdb,waans11/incubator-asterixdb,apache/incubator-asterixdb,apache/incubator-asterixdb,ecarm002/incubator-asterixdb,waans11/incubator-asterixdb,ty1er/incubator-asterixdb,ecarm002/incubator-asterixdb,apache/incubator-asterixdb,heriram/incubator-asterixdb,ecarm002/incubator-asterixdb,ty1er/incubator-asterixdb