Do not build geopmbench when OpenMP is disabled.
Do not build geopmbench when OpenMP is disabled.

Signed-off-by: Brad Geltz <e42f3ad4099980ea02f08e076efbee5cf9d4a803@intel.com>
Change-Id: I44cb2f8e3fbdfc211d394c9f15c1679aa43d273d

cmcantalupo/geopm,geopm/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm