Move include of sys/types.h in kopenafs.c

Move include of sys/types.h in kopenafs.c

The netinet/in.h header file requires the inclusion of sys/types.h
(or some portion thereof). Most systems include it implicitly
within netinet/in.h. Some, such as OpenBSD, do not. In kopenafs.c,
sys/types.h is included after netinet/in.h which is fine in most
cases but means that, as a result, it will not compile on OpenBSD.
Moving sys/types.h before netinet/in.h solves this problem (and
should cause no problems on any other system).

Change-Id: Ifc3295f3eb4f0b2b4718d0b2aa6dcbb2b06da8df
Reviewed-on: http://gerrit.openafs.org/3429
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>