[Merge] lp:~mir-team/qtubuntu/port-to-mirclient into lp:qtubuntu

[Robert Carr]

Corrected linkage against PAPI (weirdly wasnt using pkgconfig causing some peoples test builds to fail via not pulling in new PAPI)

Bumped debian dependency on PAPI doesnt seem qmake pkgconfig supports versioning
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https://code.launchpad.net/~mir-team/qtubuntu/port-to-mirclient/+merge/245164
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