linux-nilrt: remove the BUILDNAME from KERNEL ABI
linux-nilrt: remove the BUILDNAME from KERNEL ABI

The BUILDNAME string is overly verbose and tends to cause final
filepaths to exceed 260 characters, which breaks some compatibility
requirements for legacy tooling. The traceability benefits from adding
the BUILDNAME string don't outweigh the complications.

Stop adding the BUILDNAME string.

Signed-off-by: Alex Stewart <04cdb2793e4fb0120cc30d1c823099f3862701f4@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt