libcap: fix -native and usrmerge builds
When attempting to build a -native package which DEPENDS on
libcap-native the libcap libraries are not found and the build will
fail (for example attempting to build qemu-native with
'PACKAGECONFIG_append = " virtfs"').
It turns out commit
2c9c4a406a0f [libcap: fix (base_)libdir usage]
breaks builds of libcap(-native) when $root_prefix is not "". This is
because the variables which define $root_prefix are also part of
$prefix so you end up with part of the path being used twice, first as
part of 'lib=' in do_compile, and secondly as part of 'prefix=' in
do_install. When $root_prefix is "" this isn't noticed.
By using $baselib we should not re-break the issue which commit
2c9c4a406a0f was fixing but we should avoid doubling down on the
paths thus fixing the -native and usrmerge builds.
Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
