Execute-only ELFs might not work anymore

[fwsGonzo]

Due to this change execute-only ELFs might not load anymore. Testing needed. Can't easily be automated as you will need to manually patch ELFs to become XO. Maybe this commit can just be rolled back, as I suspect the commit does not solve the actual problem, rather the next commit after did.

TODO: Create tiny patched ELF with xo-segment and add it to verify-elf?