Add a new test: hpc_ghc_ghci

Small demonstration of #1779

tests/ghc_ghci/A.hs

+
+module A (a) where
+
+a :: Char
+a = 'z'

tests/ghc_ghci/B.hs

+
+module B (b) where
+
+import A
+
+b :: Char
+b = a

tests/ghc_ghci/Makefile

+# This Makefile runs the tests using GHC's testsuite framework.  It
+# assumes the package is part of a GHC build tree with the testsuite
+# installed in ../../../testsuite.
+
+TOP=../../../../testsuite
+include $(TOP)/mk/boilerplate.mk
+include $(TOP)/mk/test.mk
+
+hpc_ghc_ghci:
+	rm -f A.o A.hi
+	$(TEST_HC) -fhpc -c A.hs
+	echo b | $(TEST_HC) -v0 --interactive B.hs
+

tests/ghc_ghci/hpc_ghc_ghci.stdout

+'z'

tests/ghc_ghci/test.T

+
+test('hpc_ghc_ghci',
+     [broken(1779),
+      only_ways(['normal']),
+      only_compiler_types(['ghc'])],
+     run_command,
+     ['$MAKE -s --no-print-directory hpc_ghc_ghci'])
+