fs/procfs: add board name into version file
fs/procfs: add board name into version file

This commit adds board name into version file in proc.

Change-Id: Iea45391cefe8bd67b34dbde47cc0d95714e257c9
Signed-off-by: Jihun Ahn <31fe625dd60d1475d1b18ea57157c450e67c870a@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT