Fix ota bug
Change recovery default icons and display info

1. Change default recovery icons
2. Display useful info during recovery

Change-Id: I1977738c8dd76de343d72c6d35166007ad166ef5
Signed-off-by: Jianmin Zhou <toandrew@infthink.com>
generate result file to indicates update result

Change-Id: Ic94424847a62526d9f13f4967e1f365e9fd93f9f
Signed-off-by: Manson Li <lijinsong@infthink.com>
Ensure sdcard be mounted in OTA process

Change-Id: I1a18c9b1faaa9b425740d19d9f80d4aab2692286
Signed-off-by: Manson Li <lijinsong@infthink.com>