Testsuite: run tests in <testdir>.run instead of /tmp

As discussed in Phab:D1187, this approach makes it a bit easier to
inspect the test directory while working on a new test.

The only tests that needed changes are the ones that refer to files in
ancestor directories. Those files are now copied directly into the test
directory.

validate still runs the tests in a temporary directory in /tmp, see
`Note [Running tests in /tmp]` in testsuite/driver/runtests.py.

Update submodule hpc.

Reviewed by: simonmar

Differential Revision: https://phabricator.haskell.org/D2333

GHC Trac Issues: #11980

1 files changed, 0 insertions, 0 deletions

diff --git a/libraries/hpc b/libraries/hpc
-Subproject d8b5381bd5d03a3a75f4a1b91f1ede6fe0fd0ce
+Subproject b52ab0cc013beb1440607a7e4521a45fd6e96ce