Add Linux to the Build Matrix

Author: CodaFi

.travis.yml

@@ -1,8 +1,26 @@
-os: osx
-language: objective-c
-osx_image: xcode8
-before_install:
-  - cp ./cllvm.pc /usr/local/lib/pkgconfig/cllvm.pc 
-  - brew install llvm
-script:
-  - swift build	  
+env:
+  global:
+    - LC_CTYPE=en_US.UTF-8
+matrix:
+  include:
+    - os: osx
+      language: objective-c
+      osx_image: xcode8
+      before_install:
+        - cp ./cllvm.pc /usr/local/lib/pkgconfig/cllvm.pc 
+        - brew install llvm
+      script:
+        - swift build	
+    - os: linux
+      language: generic
+      sudo: required
+      dist: trusty
+      before_install:
+        - cp ./cllvm.pc /usr/local/lib/pkgconfig/cllvm.pc
+        - sudo aptitude install llvm
+        - wget -q -O - https://swift.org/keys/all-keys.asc | gpg --import -
+        - wget https://swift.org/builds/swift-3.0-release/ubuntu1404/swift-3.0-RELEASE/swift-3.0-RELEASE-ubuntu14.04.tar.gz
+        - tar xzf swift-3.0-RELEASE-ubuntu14.04.tar.gz
+        - export PATH=${PWD}/swift-3.0-RELEASE-ubuntu14.04/usr/bin:"${PATH}"
+      script:
+        - swift build