R15 Legato_21 and Talon Wifi IOT card

[jyijyi]

Here is an example to overlay on read only file system.

Create folders inside /mnt (w/o editing sierra_git.bb)

I remember i can overlay on read only file system. For example, mkdir /tmp/tmp_usr_lib;mkdir /tmp/tmp_usr_lib_wr; mount -t overlay overlay /usr/lib -o lowerdir=/usr/lib,upperdir=/tmp/tmp_usr_lib,workdir=/tmp/tmp_usr_lib_wr; Not sure if you can do the same.

Of course you can also rebuild the yocto image