build-artik: print release information
build-artik: print release information

This patch shows release information from $TARGET_DIR/artik_release. The
file is also included in the /etc/artik_release of root file system.

Signed-off-by: Chanho Park <8ec285a53e21b773fd914e03c50e1b6431bc9aa8@samsung.com>

SamsungARTIK/build-artik