IOT-1381 Make iotivity compile in a way usable by windows store apps

IOT-1381 Make iotivity compile in a way usable by windows store apps

Replace GetTickCount with GetTickCount64
Replace CryptGenRandom with BCryptGenRandom

Change-Id: I867f1325d576e52c10466abd7620802351b743c5
Signed-off-by: Dave Thaler <dthaler@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12701
Reviewed-by: Kevin Kane <kkane@microsoft.com>
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Soemin Tjong <stjong@microsoft.com>
Reviewed-by: David Antler <david.a.antler@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12727