.gitignore all *.cfg files, not just haas.cfg.
.gitignore all *.cfg files, not just haas.cfg.

We may start using these on other branches, let's make sure they don't
get committed accidentally.

SahilTikale/haas,henn/hil_sahil,CCI-MOC/haas,meng-sun/hil,lokI8/haas,henn/hil_sahil,henn/haas,kylehogan/haas,SahilTikale/switchHaaS,meng-sun/hil,apoorvemohan/haas,kylehogan/hil,henn/hil,apoorvemohan/haas,henn/hil,kylehogan/hil