Travis/CCache: manually add /usr/lib/ccache to the PATH
Travis/CCache: manually add /usr/lib/ccache to the PATH

A PR is ongoing on travis-build to do it automatically:

    https://github.com/travis-ci/travis-build/pull/655

Signed-off-by: David Wagner <60228a510f9a76940848fa2d29321fc4edfc2119@intel.com>

miguelgaio/parameter-framework,miguelgaio/parameter-framework,01org/parameter-framework,01org/parameter-framework,01org/parameter-framework,mgaio/parameter-framework,mgaio/parameter-framework,mgaio/parameter-framework,dawagner/parameter-framework,dawagner/parameter-framework,dawagner/parameter-framework,miguelgaio/parameter-framework