[CI] install aspcud on travis

Reviewed By: jeremydubreil

Differential Revision: D4991910

fbshipit-source-id: cf8bd91

.travis.yml

@@ -6,7 +6,10 @@ os:
 services: docker
 osx_image: xcode7.3
 before_install:
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get -qq update; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install -y aspcud; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install aspcud; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install opam; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then opam init; fi
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then opam switch 4.04.0; fi