Testsuite: don't use --interactive in Makefiles

Add a linter to encourage the use of `$(TEST_HC_OPTS_INTERACTIVE)`
instead of `$(TEST_HC_OPTS) --interactive -ignore-dot-ghci -v0`. It's
too easy to forget one of those flags when adding a new test.

Update submodule hpc.

Reviewed by: austin

Differential Revision: https://phabricator.haskell.org/D2265

GHC Trac Issues: #11468

1 files changed, 0 insertions, 0 deletions

diff --git a/libraries/hpc b/libraries/hpc
-Subproject 88b389f368d1222078ee9592236b107d061cd5f
+Subproject d8b5381bd5d03a3a75f4a1b91f1ede6fe0fd0ce