[Merge] lp:~thomas-voss/media-hub/explicit-gcc-version into lp:media-hub

[Steve Langasek]

Review: Disapprove

Fails to build because the list of exported symbols doesn't match when built with g++4.9, as seen at 
https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/landing-008/+build/6175722/+files/buildlog_ubuntu-utopic-amd64.media-hub_1.0.0%2B14.10.20140712-0ubuntu1_FAILEDTOBUILD.txt.gz

Superseded by https://code.launchpad.net/~vorlon/media-hub/explicit-gcc-version/+merge/226567
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https://code.launchpad.net/~thomas-voss/media-hub/explicit-gcc-version/+merge/224758
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