hiawatha: needs threads

Fixes
http://autobuild.buildroot.net/results/9bb3bdb9de43fc6bab119674885df2a28e5559ee/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
1 file changed