Add REUSE lint to Travis

# SPDX-FileCopyrightText: 2014, microg Project Team

# SPDX-License-Identifier: CC0-1.0

jobs:

  include:

    - name: "Build"

      language: android

sudo: false

before_script:

  - echo sdk.dir $ANDROID_HOME > local.properties

script:

  - jdk_switcher use oraclejdk8

  - export TERM=dumb

  - export JAVA_OPTS="-XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError -Xmx2048m"

  - ./gradlew build

      android:

        components:

          - tools

  - platform-tools

          - build-tools-29.0.3

          - android-29

  - extra-android-m2repository

      script:

        - export JAVA_OPTS="-XX:+CMSClassUnloadingEnabled -XX:+HeapDumpOnOutOfMemoryError -Xmx2048m"

        - export TERM=dumb

        - echo sdk.dir $ANDROID_HOME > local.properties

        - jdk_switcher use oraclejdk8

        - ./gradlew build

    - name: "REUSE lint"

      language: minimal

      script:

        - docker pull fsfe/reuse:latest

        - docker run -v ${TRAVIS_BUILD_DIR}:/data fsfe/reuse:latest lint