librdmacm/libibverbs: Statically bound libbnxtre.so.1 to rping

By default ibv_devices and rping are not statically bound to
libbnxtre.so.1. i.e. 'ldd /usr/bin/rping' command doesn't list
'libbnxtre.so.1' entry. So, statically bound the libbnxtre.so.1
library to rping & ibv_devices utils.

MFC-After: 3 days
Reviewed-by: sumit.saxena@broadcom.com
Differential-Revision: https://reviews.freebsd.org/D49604