CI/travis/lib.sh: look in `ci/travis` path for script
CI/travis/lib.sh: look in `ci/travis` path for script

Some repos are starting to use `ci/travis` as script path.
Look for a script in that path as well.

Signed-off-by: Alexandru Ardelean <685557f6b7c225d86b536740313ed51b24843a58@analog.com>

analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio