build.sh: Add support for Additional images required for recovery to boot

Description

Some devices require additional image files for recovery to boot. Earlier this was taken from LineageOS but now due LineageOS being ahead with android versions, the files available at lineage download no longer work with /e/ OS hence we need to push these images from our builds

Issue(s)

https://gitlab.e.foundation/e/devices/backlog/-/issues/474

Test environment

Test procedures

Technical details

Screenshots

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation