RDK-19819 : Storing curl download progress to a file
RDK-19819 : Storing curl download progress to a file

Reason for change: CURL download progress is stored /opt/curl_progress,
                   so that any component like SNMP, TR69 etc can get the
                   Download Percentage from this file using below steps
                       value=`cat /opt/curl_progress | tr $'\r' $'\n'  | tail -n 1`
                       echo "${value:0:3}" | sed 's/ //g'
                   Once download is complete, this file will be deleted
Test Procedure: Configure XCONF HTTP upgrade and verify /opt/curl_progress
Risks: Low
Signed-off-by: gtheres <Geethu_TheresK2@comcast.com>

Change-Id: I3c1aa27dc4b4623868c30d1209a60b655391237b

rdkcmf/rdk-sysint