openssl: INSTALL_PREFIX renamed to DESTDIR, environ ignored
INSTALL_PREFIX has been deprecated in openssl so it was renamed to DESTDIR and uses the
new make-install-extra option added here: https://lab.nexedi.com/nexedi/slapos/merge_requests/524
INSTALL_PREFIX has been deprecated in openssl so it was renamed to DESTDIR and uses the
new make-install-extra option added here: https://lab.nexedi.com/nexedi/slapos/merge_requests/524