cmake HAS_HDFS examples

vxl/vxl contrib/brl/bbas/bhdfs/CMakeLists.txt :15 

add_definitions(-DHAS_HDFS=1)

vxl/vxl contrib/brl/bseg/boxm2/io/CMakeLists.txt :10 

add_definitions(-DHAS_HDFS=1)

vxl/vxl contrib/brl/bseg/boxm2_batch/CMakeLists.txt :57 

add_definitions(-DHAS_HDFS=1)