fix(ci) try fixing cc bug

rust-lang/rust#25289 (comment)

Author: gakonst

.circleci/config.yml

@@ -21,7 +21,7 @@ jobs:
       - run:
           name: Install kcov
           command: >-
-            sudo apt-get install cmake g++ pkg-config jq libcurl4-openssl-dev libelf-dev libdw-dev binutils-dev libiberty-dev
+            sudo apt-get install cmake g++ pkg-config jq libcurl4-openssl-dev libelf-dev libdw-dev binutils-dev libiberty-dev gcc-multilib
             && cargo kcov --print-install-kcov-sh | sh
       - run:
           name: Install Redis