Exclude INFO from error/warning count.

Eclim uses signs for code reference searches and they shows up as INFO
signs. These are not errors/warnings and hence should not be included in
count.

Testing:
Verified the right count shows up.

autoload/airline/extensions/eclim.vim

@@ -26,7 +26,7 @@ function! airline#extensions#eclim#get_warnings()
 
     if (empty(errorList))
       " use the warnings
-      call filter(eclimList, 'v:val.name =~ "^\\(qf_\\)\\?\\(info\\|warning\\)$"')
+      call filter(eclimList, 'v:val.name =~ "^\\(qf_\\)\\?\\(warning\\)$"')
       let type = 'W'
     else
       " Use the errors