Update utox-9999.ebuild

The Makefile installation paths were fixed in https://github.com/notsecure/uTox/commit/11f23792ee573482750e2ce1a6090a8c89e065ac#diff-b67911656ef5d18c4ae36cb6741b7965
Merge pull request #39 from v2e/patch-1

Update utox-9999.ebuild