tizenrt: Defines __TIZENRT__ for porting
tizenrt: Defines __TIZENRT__ for porting

This will be used to workaround wint build issues

Bug: https://jira.iotivity.org/projects/LITE/issues/LITE-4
Change-Id: I2611e64ee31050b9c75dfb301690183556f724f7
Signed-off-by: Philippe Coval <e55eb7f5ae8caa4c9c0d2fc7cb5c13ca6c4cd6e0@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/25945
Tested-by: IoTivity Jenkins <6267f6022d49a8a37a7fe97da24aebfab797522c@iotivity.org>
Reviewed-by: Abhishek Pandey <bfec4fff64ad39722dcae01b68da676b133ad714@samsung.com>
Reviewed-by: Uze Choi <3a26c91d8a4a3c9e246e43339f4782bb2483aece@samsung.com>
(cherry picked from commit b0eff750fc5d95d59676ff6e5fcd4047d4dd7a4e)
Reviewed-on: https://gerrit.iotivity.org/gerrit/25955
Reviewed-by: Kishen Maloor <c62ddea3cd661a9268bff15f07fc2229cdc9ac02@intel.com>

iotivity/iotivity-constrained,iotivity/iotivity-constrained,iotivity/iotivity-constrained,iotivity/iotivity-constrained