github-ci: check that configure fails if rust to old

Migration of similar test from Travis-CI.

Redmine issue:
https://redmine.openinfosecfoundation.org/issues/3869

.github/workflows/builds.yml

@@ -568,6 +568,58 @@ jobs:
       - name: Running suricata-verify
         run: python3 ./suricata-verify/run.py
 
+  ubuntu-20-04-too-old-rust:
+    name: Ubuntu 20.04 (unsupported rust)
+    runs-on: ubuntu-latest
+    container: ubuntu:20.04
+    needs: centos-8
+    steps:
+      - name: Install dependencies
+        run: |
+          apt update
+          apt -y install \
+                build-essential \
+                curl \
+                libtool \
+                libpcap-dev \
+                libnet1-dev \
+                libyaml-0-2 \
+                libyaml-dev \
+                libcap-ng-dev \
+                libcap-ng0 \
+                libmagic-dev \
+                libnetfilter-queue-dev \
+                libnetfilter-queue1 \
+                libnfnetlink-dev \
+                libnfnetlink0 \
+                libhiredis-dev \
+                libjansson-dev \
+                libevent-dev \
+                libevent-pthreads-2.1-7 \
+                libjansson-dev \
+                libpython2.7 \
+                libpcre3 \
+                libpcre3-dev \
+                make \
+                python3-yaml \
+                software-properties-common \
+                zlib1g \
+                zlib1g-dev \
+      - run: curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.33.0 -y
+      - run: echo "::add-path::$HOME/.cargo/bin"
+      - name: Download suricata.tar.gz
+        uses: actions/download-artifact@v2
+        with:
+          name: dist
+      - run: tar zxvf suricata-*.tar.gz --strip-components=1
+      - run: |
+          if ./configure; then
+            echo "error: configure should have failed"
+            exit 1
+          else
+            exit 0
+          fi
+
   ubuntu-18-04-debug-validation:
     name: Ubuntu 18.04 (Debug Validation)
     runs-on: ubuntu-18.04