Xcode: one more skip.

test cases/common/182 same target name flat layout/meson.build

@@ -1,5 +1,9 @@
 project('subdir targets', 'c')
 
+if meson.backend() == 'xcode'
+    error('MESON_SKIP_TEST: many targets with the same name not supported in Xcode. Patches welcome.')
+endif
+
 # Idea behind this test is to create targets with identical name
 # but different output files. We can do this by choosing different
 # name_prefix of libraries. Target id does not depend on name_prefix.