core test /tset/POSIX.os/files/ftruncate/T.ftruncate 2, truncate/T.truncate 3 FAIL sles11/s390

[Jeff Johnson]

Seeing these fail in beta test runs in the sles11/s390 chroot:

/tset/POSIX.os/files/ftruncate/T.ftruncate 2 failed

Message from the test:

Checks the ftruncate() for error value of EINVAL
ftruncate() expected to return 0, expected to return -1

/tset/POSIX.os/files/truncate/T.truncate 3 failed

Message from the test:

Checks the truncate() for error value of EINVAL
truncate() expected to return 0, expected to return -1

These were recent additions. The assertion is:

 * This test case checks for error value EINVAL.
 * If the lenth argument is less than 0,
 * then truncate will return -1 with errno set to EINVAL
 */

with the test call of:

ret = truncate("testfile1", -1);
if (ret != -1) {
       tet_printf("truncate() expected to return %d, expected to return
-1",ret);
       tet_result(TET_FAIL);
}

ftruncate setup is the same.

Apparently -1 isn't an invalid length on s390.
Message language could be clarified a bit too.