6e52173261
This allows WITH_DEBUG_FILES to produce standalone debug for the ELF runtime linker. We previously disabled standalone debug files for bsd.prog.mk consumers that included a non-default ${PROG} target, but this is not required. Consumers that do not support standalone debug are still handled by disabling it for statically linked binaries, and for those that specify a non-default binary format. Sponsored by: DARPA, AFRL