Update .gitignore to ignore potentially generated files for ccncat.1 documentation.  Refs 100291
Update .gitignore to ignore potentially generated files for ccncat.1 documentation.  Refs 100291

svartika/ccnx,svartika/ccnx,svartika/ccnx,ebollens/ccnmp,cawka/ndnx,svartika/ccnx,cawka/ndnx,svartika/ccnx,cawka/ndnx,svartika/ccnx,ebollens/ccnmp,ebollens/ccnmp,ebollens/ccnmp,cawka/ndnx,cawka/ndnx,svartika/ccnx