core-image-pelux: Enable .ext3.gz images generation
core-image-pelux: Enable .ext3.gz images generation

Those compressed images can then be used to create smaller SWUpdate
update bundles.

Signed-off-by: Florent Revest <f3a243d30ac77beaf87c86f4ee386884cad18cf5@gmail.com>

GordanM/meta-pelux,Pelagicore/meta-pelux,Pelagicore/meta-pelux,GordanM/meta-pelux,Pelagicore/meta-pelux