CPC-1834 : Changing the image extension for peripheral images
CPC-1834 : Changing the image extension for peripheral images

Reason for change: Chnages extension from .bin to .tgz
Test Procedure: Verify XCONF Peripheral Upgrades
Risks: Low
Signed-off-by: gtheres <Geethu_TheresK2@comcast.com>

Change-Id: Ia6195e871217bbf72bd0ada5d4a936e76d9baa1a
(cherry picked from commit 5d38ea6529e7be9714e15a0f5a487effd3e71a08)

rdkcmf/rdk-sysint