Adding some mac awareness to the Makefile so that the tests can be ran on mac.
Adding some mac awareness to the Makefile so that the tests can be ran on mac.

chanchett/ds3_c_sdk,shabtaisharon/ds3_c_sdk,rpmoore/ds3_c_sdk,TigerTechnology/ds3_c_sdk,tigertechdev/ds3_c_sdk,robertgrimm/ds3_c_sdk,DenverM80/ds3_c_sdk,chanchett/ds3_c_sdk,tigertechdev/ds3_c_sdk,robertgrimm/ds3_c_sdk,DenverM80/ds3_c_sdk,SpectraLogic/ds3_c_sdk,rpmoore/ds3_c_sdk,shabtaisharon/ds3_c_sdk,SpectraLogic/ds3_c_sdk,TigerTechnology/ds3_c_sdk,robertgrimm/ds3_c_sdk,DenverM80/ds3_c_sdk,tigertechdev/ds3_c_sdk,SpectraLogic/ds3_c_sdk,chanchett/ds3_c_sdk,rpmoore/ds3_c_sdk,SpectraLogic/ds3_c_sdk,TigerTechnology/ds3_c_sdk,DenverM80/ds3_c_sdk,TigerTechnology/ds3_c_sdk,robertgrimm/ds3_c_sdk,shabtaisharon/ds3_c_sdk