message: scripts: more robustly test macOS symbol checks
diff: @@ -99,7 +99,7 @@ class TestSymbolChecks(unittest.TestCase):
  ''')
  - self.assertEqual(call_symbol_check(cc, source, executable, ['-lexpat']),
  + self.assertEqual(call_symbol_check(cc, source, executable, ['-lexpat', '-Wl,-platform_version','-Wl,macos', '-Wl,11.4', '-Wl,11.4']),
  (1, 'libexpat.1.dylib is not in ALLOWED_LIBRARIES!\n' +
  f'{executable}: failed DYNAMIC_LIBRARIES MIN_OS SDK'))
  @@ -116,7 +116,7 @@ class TestSymbolChecks(unittest.TestCase):
  }
  ''')
  - self.assertEqual(call_symbol_check(cc, source, executable, ['-framework', 'CoreGraphics']),
  + self.assertEqual(call_symbol_check(cc, source, executable, ['-framework', 'CoreGraphics', '-Wl,-platform_version','-Wl,macos', '-Wl,11.4', '-Wl,11.4']),
  (1, f'{executable}: failed MIN_OS SDK'))
  source = 'test3.c'
  @@ -129,7 +129,7 @@ class TestSymbolChecks(unittest.TestCase):
  }
  ''')
  - self.assertEqual(call_symbol_check(cc, source, executable, ['-mmacosx-version-min=10.14']),
  + self.assertEqual(call_symbol_check(cc, source, executable, ['-Wl,-platform_version','-Wl,macos', '-Wl,10.14', '-Wl,11.4']),
  (1, f'{executable}: failed SDK'))
  def test_PE(self):
  