Installs Linux build deps

Author: mnmaita

.github/workflows/ci.yml

@@ -97,6 +97,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Install alsa and udev
+        run: sudo apt-get update; sudo apt-get install --no-install-recommends libasound2-dev libudev-dev
+        if: runner.os == 'linux'
       - name: Installs cargo-deadlinks
         run: cargo install cargo-deadlinks
       - name: Checks dead doc links