exec: Remove unnecessary spaces from binfmts.h

exec: Remove unnecessary spaces from binfmts.h

The general convention in the linux kernel is to define a pointer
member as "type *name".  The declaration of struct linux_binprm has
several pointer defined as "type * name".  Update them to the
form of "type *name" for consistency.

Suggested-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lkml.kernel.org/r/87v9iq6x9x.fsf@x220.int.ebiederm.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>