Auto merge of #299 - mbrubeck:ci, r=jdm

Fix apt-get errors in CI

None

Author: bors-servo

.github/workflows/main.yml

@@ -30,7 +30,7 @@ jobs:
 
       - name: Install packages
         if: matrix.os == 'ubuntu-latest'
-        run: sudo apt-get install -y binutils-dev libunwind8-dev libcurl4-openssl-dev libelf-dev libdw-dev cmake gcc libiberty-dev
+        run: sudo apt-get update -y && sudo apt-get install -y binutils-dev libunwind8-dev libcurl4-openssl-dev libelf-dev libdw-dev cmake gcc libiberty-dev
 
       - name: Install toolchain
         uses: actions-rs/toolchain@v1