Add linux jobs to Travis

.travis.yml

@@ -1,12 +1,24 @@
-language: objective-c
-osx_image: xcode8
-script:
-- set -o pipefail
-- xcodebuild -scheme Base32 -sdk macosx build-for-testing test | xcpretty
-- xcodebuild -scheme Base32 -sdk iphonesimulator -destination "name=iPhone 7" build-for-testing test | xcpretty
-- xcodebuild -scheme Base32 -sdk appletvsimulator -destination "name=Apple TV 1080p" build-for-testing test | xcpretty
-- xcodebuild -scheme Base32 -sdk watchsimulator -destination "name=Apple Watch - 38mm" build | xcpretty
-- swift build && swift test
+language: generic
+matrix:
+  include:
+  - script:
+    - set -o pipefail
+    - xcodebuild -scheme Base32 -sdk macosx build-for-testing test | xcpretty
+    - xcodebuild -scheme Base32 -sdk iphonesimulator -destination "name=iPhone 7" build-for-testing test | xcpretty
+    - xcodebuild -scheme Base32 -sdk appletvsimulator -destination "name=Apple TV 1080p" build-for-testing test | xcpretty
+    - xcodebuild -scheme Base32 -sdk watchsimulator -destination "name=Apple Watch - 38mm" build | xcpretty
+    - swift test
+    env: JOB=macOS
+    os: osx
+    osx_image: xcode8.2
+  - script: docker run -v `pwd`:`pwd` -w `pwd` norionomura/sourcekit:302 swift test
+    env: JOB=Linux-Swift3.0.2
+    sudo: required
+    services: docker
+  - script: docker run -v `pwd`:`pwd` -w `pwd` norionomura/sourcekit:3120170211a swift test
+    env: JOB=Linux-Swift3.1
+    sudo: required
+    services: docker
 notifications:
   webhooks:
     secure: TKFWG5dDRlNK/XbsC7eKDEh7vnydCUYjGc1Sv9DUOfRjvxYBMq+ys8R9iHAotNNtnCdacohM0bcwT1ZXQcRTYKEd6vKtY1XkkPA2xBogLVfhu17DCDMhJ3iTtati1mMK1rVeSgseXffOKVq1ZjNGjBVCIHl0PZoj5jFiOwYKKO8=