LU-7356 build: handle library configure options for SNMP/LNet

Currently if you build lustre with configure options
--disable-shared and/or --disable-static it will fail
to build in the case of the mount plugins or just plain
ignore the configure request. This work enables the
ability to create only static or only dynamic libraries
for lustre SNMP and libnetconfig.

Change-Id: I8b526acd50a7b8eb4f65e7a3bdd0a664e9144376
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: http://review.whamcloud.com/17576


Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>