lxatac-core-image-base: add lrzsz for x/y/zmodem support

Xmodem is cumbersome enough as it is without having to forward it over
TCP to remote hosts, which may not always work.

Therefore, include support for the lrzsz suite of tools, so users can
ssh to the lxatac and run them locally if needed.

This has been tested by copying the resulting lsz binary to the
lxatac and running

  lsz -X -vv </dev/ttyUSB2 >/dev/ttyUSB2 fw_payload.bin.out

This can be done without issues in parallel with the shell being
exported and used by ser2net.

Signed-off-by: Ahmad Fatoum <[email protected]>

meta-lxatac-software/recipes-core/images/lxatac-core-image-base.bb

@@ -72,6 +72,7 @@ IMAGE_INSTALL:append = "\
     linux-serial-test \
     lldpd \
     lmsensors \
+    lrzsz\
     lxatac-factory-data \
     lxatac-led-setup \
     lxatac-lldpd-config \