Fix package creation warnings

The following warnings are generated during package creation:

    W: ubuntu-xboxdrv source: debhelper-but-no-misc-depends ubuntu-xboxdrv
    W: ubuntu-xboxdrv source: package-needs-versioned-debhelper-build-depends 9
    W: ubuntu-xboxdrv source: out-of-date-standards-version 3.9.4 (current is 3.9.5)

Fix them.