[Merge] lp:~thomas-voss/process-cpp/explicit-gcc-version into lp:process-cpp

[Steve Langasek]

Review: Needs Fixing

symbols file is incorrect on ppc64el due to a dropped symbol, causing a build failure as shown at <https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/landing-008/+build/6175687/+files/buildlog_ubuntu-utopic-ppc64el.process-cpp_2.0.0%2B14.10.20140712-0ubuntu1_FAILEDTOBUILD.txt.gz>.

Superseded by https://code.launchpad.net/~vorlon/process-cpp/explicit-gcc-version/+merge/226564
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https://code.launchpad.net/~thomas-voss/process-cpp/explicit-gcc-version/+merge/224755
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