Make ppr_tc_args aware of -fprint-explicit-kinds

Authored by RyanGlScott on Jul 5 2018, 7:52 AM.

Description

Make ppr_tc_args aware of -fprint-explicit-kinds

Summary:
ppr_tc_args was printing invisible kind arguments even
when -fprint-explicit-kinds wasn't enabled. Easily fixed.

Test Plan: make test TEST=T15341

Reviewers: goldfire, bgamari, simonpj

Reviewed By: simonpj

Subscribers: simonpj, rwbarton, thomie, carter

GHC Trac Issues: Trac #15341

Differential Revision: https://phabricator.haskell.org/D4932

(cherry picked from commit dbdcacfc55f28d8a85484cc1cf13dd78c45bf7ee)