Skip break017 if fast (bit of a hack; just to make the validate script work)

testsuite/tests/ghc-regress/ghci.debugger/scripts/all.T

@@ -41,7 +41,7 @@ test('break013', normal, ghci_script, ['break013.script'])
 test('break014', normal, ghci_script, ['break014.script'])
 test('break015', expect_broken(1457), ghci_script, ['break015.script'])
 test('break016', normal, ghci_script, ['break016.script'])
-test('break017', normal, ghci_script, ['break017.script'])
+test('break017', skip_if_fast, ghci_script, ['break017.script'])
 test('break018', normal, ghci_script, ['break018.script'])
 test('break019', normal, ghci_script, ['break019.script'])