Update common Prometheus files (#1046)

Signed-off-by: prombot <prometheus-team@googlegroups.com>

.github/workflows/golangci-lint.yml

@@ -21,6 +21,9 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: 1.18.x
+      - name: Install snmp_exporter/generator dependencies
+        run: sudo apt-get update && sudo apt-get -y install libsnmp-dev
+        if: github.repository == 'prometheus/snmp_exporter'
       - name: Lint
         uses: golangci/golangci-lint-action@v3.1.0
         with: