Use travis_wait to avoid getting timed out

Author: snoyberg

.travis.yml

@@ -68,15 +68,16 @@ before_install:
 
 install:
  - if ! [ "$BUILD" = style ]; then echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"; fi
- # Note: we build store by itself below due to high memory usage
+ # Note: we build Cabal and store by themselves below due to high memory usage/time
  - |
    set -ex
    case "$BUILD" in
      style)
        ./etc/scripts/get-hlint.sh
        ;;
      stack)
-       stack --no-terminal build store
+       travis_wait stack --no-terminal build Cabal
+       travis_wait stack --no-terminal build store
        stack --no-terminal test --only-dependencies
        ;;
      cabal)