Add FC_FONT_HAS_HINT property to see if font has hinting or not.

This may helps to enable autohint only when font doesn't have any hinting
3 jobs for has-hinting in 5 minutes and 21 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Build
passed mingw-build #453337

00:04:45

passed shared-build #453335

00:05:21

passed static-build #453336

00:04:23