Squish: Add expected error message for newer Xcode

Change-Id: Ib6af4b61d4ca7bd32b3e3e9dcb837a91692a1dfe
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Squish: Add workaround to avoid AUT crash on Mac

The crash was actually only in tst_SCOM05 as WELP suite is
completely disabled.

Change-Id: I32d9bef43dc50eb8d3c71a5b1d6e7894c7d74276
Reviewed-by: Robert Loehning <robert.loehning@digia.com>