meta: use ln -rs instead of lnr
lnr is a script in oe-core that creates relative symlinks, with the same
behaviour as `ln --relative --symlink`. It was added back in 2014[1] as
not all of the supported host distributions at the time shipped
coreutils 8.16, the first release with --relative.
However the oldest coreutils release in the supported distributions is
now 8.22 in CentOS 7, so lnr can be deprecated and users switched to ln.
[1]
6ae3b85eaffd1b0b6914422e8de7c1230723157d
Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
