Replace tellbootie call with reboot/halt call

[GF-3190] reboot command is not working as expected

Open-webOS-DCO-1.0-Signed-off-by: Janne Hurskainen <janne.hurskainen@palm.com>

Change-Id: Ifdca56634e457fa18d05464ab17149d2dc0333fd
Reviewed-on: https://g2g.palm.com/1949
Reviewed-by: Build Verification
Reviewed-by: Janne Hurskainen <janne.hurskainen@palm.com>
Tested-by: Janne Hurskainen <janne.hurskainen@palm.com>
Reviewed-by: Herb Kuta <herb.kuta@lge.com>
Reviewed-by: Keith Derrick <keith.derrick@lge.com>