fix for COMPILER-8918: don't add exception into list of caught exceptions if it's already in the list
fix for COMPILER-8918: don't add exception into list
of caught exceptions if it's already in the list

vegard/libcxxrt,cemeyer/libcxxrt,sudosurootdev/external_libcxxrt,xin3liang/platform_external_libcxxrt,xin3liang/platform_external_libcxxrt,sudosurootdev/external_libcxxrt,cemeyer/libcxxrt,vegard/libcxxrt,sudosurootdev/external_libcxxrt,cemeyer/libcxxrt,xin3liang/platform_external_libcxxrt,vegard/libcxxrt