d2-common: add ext4 as second filesystem for sdcard for recovery

Signed-off-by: bmc08gt <bmc08gt.teamb00sted@gmail.com>
Change-Id: I795585515504c7699e6edf3ee8432c592fa39508
Merge "d2-common: add ext4 as second filesystem for sdcard for recovery" into jb-mr1