In order to be able to use the xenlibs-dependencies macro from stubdom
build, move it to tools/libs/uselibs.mk, which is included from
current users and stubdom/Makefile.
No functional change intended.
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Anthony PERARD <anthony.perard@vates.tech>