scripts: add travis build support

.travis.yml

@@ -0,0 +1,9 @@
+language: cpp
+os: linux
+sudo: required
+
+services:
+  - docker
+
+script:
+  - scripts/build-with-docker.sh

scripts/build-with-docker.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+docker pull ubuntu:16.04
+docker run -i -t -v $PWD:/anbox ubuntu:16.04 /anbox/scripts/clean-build.sh

scripts/clean-build.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+set -ex
+
+apt-get update -qq
+apt-get install -qq -y \
+  build-essential \
+  debhelper \
+  git
+
+apt-get clean
+
+cd /anbox
+
+cleanup() {
+  # In cases where anbox comes directly from a checked out Android
+  # build environment we miss some symlinks which are present on
+  # the host and don't have a valid git repository in that case.
+  if [ -d .git ] ; then
+    git clean -fdx .
+    git reset --hard
+  fi
+}
+
+cleanup
+
+apt-get install -y build-essential curl devscripts gdebi-core dkms dh-systemd
+apt-get install -y $(gdebi --quiet --apt-line ./debian/control)
+debuild -us -uc