Disable test for setting the creation time under Unix.

Also document that this doesn't work there.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74424 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/filename/filenametest.cpp

@@ -685,7 +685,11 @@ void FileNameTestCase::TestSetTimes()
     CPPUNIT_ASSERT( fn.GetTimes(&dtAccess2, &dtModify2, &dtCreate2) );
     CPPUNIT_ASSERT_EQUAL( dtAccess, dtAccess2 );
     CPPUNIT_ASSERT_EQUAL( dtModify, dtModify2 );
+
+    // Under Unix the creation time can't be set.
+#ifdef __WINDOWS__
     CPPUNIT_ASSERT_EQUAL( dtCreate, dtCreate2 );
+#endif // __WINDOWS__
 }
 
 void FileNameTestCase::TestExists()