CI/travis/deploy: extend cleanup to all debian packages
CI/travis/deploy: extend cleanup to all debian packages

We should also cleanup Trusty debian packages, since Trusty is the current
default image used in Travis-CI.
And also include Xenial images in the cleanup (since they were added now).

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

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