add gpu example

Author: liubo

examples/disp_gpu.py

@@ -0,0 +1,17 @@
+from pythonlsf import lsf
+if __name__ == '__main__':
+   print("LSF Clustername is : {}".format(lsf.ls_getclustername()))
+   if lsf.lsb_init("test") > 0:
+       exit -1;
+   host_names = None
+   num_hosts = lsf.new_intp()
+   lsf.intp_assign(num_hosts, 0)
+   host_data = lsf.lsb_hostinfo_ex(host_names, num_hosts, "", 4096)
+   all_host_data = lsf.hostInfoEntArray_frompointer(host_data)
+   for i in range(0, lsf.intp_value(num_hosts)):
+     hostname = all_host_data[i].host
+     print(hostname)
+     gpudata = all_host_data[i].gpuData
+     print("ngpus avail_shared_gpus avail_excl_gpus")
+     print("   {}              {}              {}". \
+                format(gpudata.ngpus, gpudata.avail_shared_ngpus, gpudata.avail_excl_ngpus))