Small cleanup in travis configuration.

Removed g++ update-alternatives.

Signed-off-by: Lukasz Gromanowski <lgromanowski@gmail.com>
Small cleanup in travis configuration file.

Removed another part of update-alternatives.

Signed-off-by: Lukasz Gromanowski <lgromanowski@gmail.com>
Merge pull request #33 from lgromanowski/travis

Small cleanup in travis configuration.