Fix uclibc DNS search paths

[aledbf]

Fixes #9

This PR contains the patch created by @thockin: http://mailman.uclibc-ng.org/pipermail/devel/2016-February/000775.html

$ docker run --dns-search=f1 --dns-search=f2 --dns-search=f3 --dns-search=f4 --dns-search=f5 --dns-search=f6 --dns-search=f7 --dns-search=f8 --dns-search=f9 --dns-search=google.com  busybox:uclibc nslookup www
Server:    8.8.8.8
Address 1: 8.8.8.8 google-public-dns-a.google.com

Name:      www
Address 1: 2800:3f0:4003:c01::63
Address 2: 190.45.0.39 pc-39-0-45-190.cm.vtr.net
Address 3: 190.45.0.30 pc-30-0-45-190.cm.vtr.net
Address 4: 190.45.0.20 pc-20-0-45-190.cm.vtr.net
Address 5: 190.45.0.24 pc-24-0-45-190.cm.vtr.net
Address 6: 190.45.0.29 pc-29-0-45-190.cm.vtr.net
Address 7: 190.45.0.35 pc-35-0-45-190.cm.vtr.net
Address 8: 190.45.0.44 pc-44-0-45-190.cm.vtr.net
Address 9: 190.45.0.54 pc-54-0-45-190.cm.vtr.net
Address 10: 190.45.0.50 pc-50-0-45-190.cm.vtr.net
Address 11: 190.45.0.34 pc-34-0-45-190.cm.vtr.net
Address 12: 190.45.0.25 pc-25-0-45-190.cm.vtr.net
Address 13: 190.45.0.45 pc-45-0-45-190.cm.vtr.net
Address 14: 190.45.0.59 pc-59-0-45-190.cm.vtr.net
Address 15: 190.45.0.40 pc-40-0-45-190.cm.vtr.net
Address 16: 190.45.0.55 pc-55-0-45-190.cm.vtr.net
Address 17: 190.45.0.49 pc-49-0-45-190.cm.vtr.net

[thockin]

LGTM - no word from upstream, yet, though.