Skip a few tests properly

test cases/d/3 shared library/meson.build

@@ -1,12 +1,9 @@
 project('D Shared Library', 'd')
 
-if meson.get_compiler('d').get_id() != 'gcc'
+if meson.get_compiler('d').get_id() == 'gcc'
-
+  error('MESON_SKIP_TEST: GDC can not build shared libraries')
-    ldyn = shared_library('stuff', 'libstuff.d', install : true)
-    ed = executable('app_d', 'app.d', link_with : ldyn, install : true)
-    test('linktest_dyn', ed)
-
-else
-    message('GDC can not build shared libraries. Test skipped.')
-    install_data('no-installed-files', install_dir : '')
 endif
+
+ldyn = shared_library('stuff', 'libstuff.d', install : true)
+ed = executable('app_d', 'app.d', link_with : ldyn, install : true)
+test('linktest_dyn', ed)