travis-ci: verify Deb packages for PHP 7.0

Verify Deb packages on distributions, which provides PHP 7.0: it is
Debian Stretch and Ubuntu Xenial.

Now the Debian build files (debian/ directory) allow to build against
PHP 7.0 only (not PHP 7.1+), because of hardcoded package name and
installation paths. That is why newer Debian and Ubuntu distributions
are not enabled here. It will be fixes in the following commits.

Part of #117

Author: Totktonada

.travis.yml

@@ -103,6 +103,13 @@ jobs:
     - env: OS=fedora DIST=30
     - env: OS=fedora DIST=31
 
+    # Deb packages
+    # ------------
+    # Debian < 8 (Stretch) do not provide PHP 7.*.
+    # Ubuntu < 16.04 (Xenial) do not provide PHP 7.*.
+    - env: OS=debian DIST=stretch
+    - env: OS=ubuntu DIST=xenial
+
 python:
   - 2.7
 

test.pkg.all.sh

@@ -11,6 +11,8 @@ distros="
     fedora:29
     fedora:30
     fedora:31
+    debian:stretch
+    ubuntu:xenial
 "
 
 if ! type packpack; then