compat.exp: Handle dg-options per source file.

compat.exp: Handle dg-options per source file.

	* lib/compat.exp: Handle dg-options per source file.
	* g++.dg/compat/abi/bitfield1_x.C: Specify dg-options.
	* g++.dg/compat/abi/bitfield1_y.C: Ditto.
	* g++.dg/compat/abi/bitfield2_x.C: Ditto.
	* g++.dg/compat/abi/bitfield2_y.C: Ditto.
	* g++.dg/compat/abi/vbase8-10_x.C: Ditto.
	* g++.dg/compat/abi/vbase8-10_y.C: Ditto.
	* g++.dg/compat/abi/vbase8-21_x.C: Ditto.
	* g++.dg/compat/abi/vbase8-21_y.C: Ditto.
	* g++.dg/compat/abi/vbase8-22_x.C: Ditto.
	* g++.dg/compat/abi/vbase8-22_y.C: Ditto.
	* g++.dg/compat/abi/vbase8-4_x.C: Ditto.
	* g++.dg/compat/abi/vbase8-4_y.C: Ditto.
	* g++.dg/compat/break/bitfield7_x.C: Ditto.
	* g++.dg/compat/break/bitfield7_y.C: Ditto.

From-SVN: r69649