fix chalk build

Author: gnzlbg

ci/integration.sh

@@ -64,6 +64,15 @@ case ${INTEGRATION} in
         check_fmt
         cd -
         ;;
+    chalk)
+        git clone --depth=1 https://github.com/rust-lang-nursery/${INTEGRATION}.git
+        cd ${INTEGRATION}
+        # Need to run build.rs once.
+        # See: https://github.com/rust-lang-nursery/rustfmt/issues/2789
+        cargo build
+        check_fmt
+        cd -
+        ;;
     failure)
         git clone --depth=1 https://github.com/rust-lang-nursery/${INTEGRATION}.git
         cd ${INTEGRATION}/failure-1.X