SI-7622 -Xshow-phases can show disabled phases
SI-7622 -Xshow-phases can show disabled phases

With -Ydebug, -Xshow-phases will show phases that are skipped
or not enabled.

The code is slightly refactored, so the flags table will also benefit.

scala/scala,felixmulder/scala,jvican/scala,lrytz/scala,jvican/scala,scala/scala,felixmulder/scala,martijnhoekstra/scala,martijnhoekstra/scala,jvican/scala,slothspot/scala,shimib/scala,slothspot/scala,slothspot/scala,lrytz/scala,slothspot/scala,martijnhoekstra/scala,slothspot/scala,slothspot/scala,felixmulder/scala,martijnhoekstra/scala,scala/scala,jvican/scala,martijnhoekstra/scala,shimib/scala,lrytz/scala,shimib/scala,lrytz/scala,jvican/scala,lrytz/scala,felixmulder/scala,felixmulder/scala,jvican/scala,jvican/scala,shimib/scala,shimib/scala,shimib/scala,felixmulder/scala,scala/scala,scala/scala,felixmulder/scala,slothspot/scala,martijnhoekstra/scala,lrytz/scala,scala/scala