Add CIFuzz workflow to run fuzzers on push or PR.

https://google.github.io/oss-fuzz/getting-started/continuous-integration/

.github/workflows/main.yml

@@ -0,0 +1,40 @@
+# See: https://google.github.io/oss-fuzz/getting-started/continuous-integration/
+
+name: CIFuzz
+on:
+  # Trigger the workflow on push or pull requests, but only for the
+  # master branch and only for C source files.
+  push:
+    branches:
+      - master
+    paths:
+      - '**.c'
+      - '**.h'
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '**.c'
+      - '**.h'
+jobs:
+  Fuzzing:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Build Fuzzers
+      id: build
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'sudoers'
+        dry-run: false
+    - name: Run Fuzzers
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'sudoers'
+        fuzz-seconds: 600
+        dry-run: false
+    - name: Upload Crash
+      uses: actions/upload-artifact@v1
+      if: failure() && steps.build.outcome == 'success'
+      with:
+        name: artifacts
+        path: ./out/artifacts