Tests: Add Xcode cases fixed by switch to the "new build system"

Support of 'new build system' in Xcode fixes indirectly few issues
which were caused by workaround with `XCODE_DEPEND_HELPER.cmake`
autogenerated script.

This patch adds test which is originated from issue #20260 and
reproduces this issue when 'new build system' is disabled.

Fixes: #20260

1 files changed, 5 insertions, 0 deletions

diff --git a/Tests/RunCMake/XcodeProject/subproject_two_object_libs/dummy.cpp b/Tests/RunCMake/XcodeProject/subproject_two_object_libs/dummy.cpp
new file mode 100644
index 0000000..8082abc
--- /dev/null
+++ b/Tests/RunCMake/XcodeProject/subproject_two_object_libs/dummy.cpp
@@ -0,0 +1,5 @@
+namespace {
+void foo()
+{
+}
+}