.travis.yml: Add --yes to add-apt-repository ppa:ubuntu-toolchain-r/test.
.travis.yml: Add --yes to add-apt-repository ppa:ubuntu-toolchain-r/test.

csuideal/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,csuideal/log4cplus,csuideal/log4cplus,csuideal/log4cplus,ccpaging/log4cplus