testsuite: Mark cgrun057 as fragile on all platforms

I have seen this fail both on x86-64/Debian 9 and armv7/Debian 9

See #17554.

testsuite/tests/codeGen/should_run/all.T

@@ -59,7 +59,7 @@ test('cgrun054', normal, compile_and_run, [''])
 test('cgrun055', normal, compile_and_run, [''])
 test('cgrun056', normal, compile_and_run, [''])
 test('cgrun057', [ only_ways(prof_ways),
-                   when(arch('arm'), fragile(17554)),
+                   fragile(17554),
                    extra_run_opts('+RTS -xc') ], compile_and_run, [''])
 test('cgrun058', normal, compile_and_run, [''])
 test('cgrun059', exit_code(1), compile_and_run, [''])