Xcode: skip one more object extraction test.

test cases/common/152 duplicate source names/meson.build

@@ -1,5 +1,17 @@
 project('proj', 'c')
 
+if meson.backend() == 'xcode'
+    # Xcode gives object files unique names but only if they would clash. For example
+    # two files named lib.o instead get the following names:
+    #
+    # lib-4fbe522d8ba4cb1f1b89cc2df640a2336b92e1a5565f0a4c5a79b5b5e2969eb9.o
+    # lib-4fbe522d8ba4cb1f1b89cc2df640a2336deeff2bc2297affaadbe20f5cbfee56.o
+    #
+    # No-one has reverse engineered the naming scheme so we would access them.
+    # IF you feel up to the challenge, patches welcome.
+    error('MESON_SKIP_TEST, Xcode can not extract objs when they would have the same filename.')
+endif
+
 sources = []
 subdir('dir1')
 subdir('dir2')