testsuite: Disable more tests in unregisterised build

This disables `ghcilink005`, `foreignInterruptable`, and `T7040_ghci` in
the unregisterised build as they tend to fail non-deterministically. See
ticket #16085.

testsuite/tests/ghci/linking/all.T

@@ -19,8 +19,12 @@ test('ghcilink004',
       when(arch('powerpc64') or arch('powerpc64le'), expect_broken(11259))],
      run_command, ['$MAKE -s --no-print-directory ghcilink004'])
 
-test('ghcilink005', [extra_files(['TestLink.hs', 'f.c']),
-                     unless(doing_ghci, skip)], run_command,
+test('ghcilink005',
+     [extra_files(['TestLink.hs', 'f.c']),
+      # Fragile when unregisterised; see #16085
+      when(unregisterised(), skip),
+      unless(doing_ghci, skip)],
+     run_command,
      ['$MAKE -s --no-print-directory ghcilink005'])
 
 test('ghcilink006', [unless(doing_ghci, skip)], run_command,

testsuite/tests/rts/all.T

@@ -247,6 +247,8 @@ test('T7040', [omit_ways(['ghci'])], compile_and_run, ['T7040_c.c'])
 test('T7040_ghci',
      [extra_files(['T7040_c.h']),
       only_ways(['ghci']),
+      # Fragile when unregisterised; see #16085
+      when(unregisterised(), skip),
       pre_cmd('$MAKE -s --no-print-directory T7040_ghci_setup')],
      compile_and_run, ['T7040_ghci_c.o'])
 

testsuite/tests/th/all.T

@@ -149,7 +149,10 @@ test('T3177', normal, compile, ['-v0'])
 test('T3177a', normal, compile_fail, ['-v0'])
 
 test('T3319', normal, compile, ['-ddump-splices -v0'])
-test('TH_foreignInterruptible', normal, compile, ['-ddump-splices -v0'])
+test('TH_foreignInterruptible',
+     # Fragile when unregisterised; see #16085
+     when(unregisterised(), skip),
+     compile, ['-ddump-splices -v0'])
 test('TH_foreignCallingConventions', normal,
                                      compile,
                                      ['-ddump-splices -dsuppress-uniques -v0'])