CMake Nightly Date Stamp
OpenBSD: Enable ELF parsing and editing (#14241)

OpenBSD provides ELF ABI declarations in

 #include <stdint.h>
 #include <elf_abi.h>

Teach the platform check and cmELF implementation to use these.
Merge topic 'openbsd-elf-parsing' into next

480e924 OpenBSD: Enable ELF parsing and editing (#14241)
9f160c5 CMake Nightly Date Stamp