antirollback: add missing newline and change E2BIG->EPERM.

E2BIG is defined as "Argument list too long" which isn't really accurate.
EPERM is "operation not permitted" which is somewhat more accurate for a
security-related rejection.  EINVAL would also probably be a reasonable
option (and is used for some other reasons the setting might be rejected).

Change-Id: I93f35378e7020baf1f98dff72dcac69658c0d89c
1 file changed