cobol: Add POSIX tests

gcc/testsuite/ChangeLog:

	* cobol.dg/group2/Hello.cob: New test.
	* cobol.dg/group2/Hello.out: New test.
	* cobol.dg/group2/Read_and_write_errno.cob: New test.
	* cobol.dg/group2/Read_and_write_errno.out: New test.
4 files changed