Add CIFuzz to workflows

Signed-off-by: Ralph Giles <giles@thaumas.net>

.github/workflows/cifuzz.yml

@@ -0,0 +1,35 @@
+name: CIFuzz
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+jobs:
+ Fuzzing:
+   runs-on: ubuntu-latest
+   strategy:
+     fail-fast: false
+     matrix:
+       sanitizer: [address, undefined, memory]
+   steps:
+   - name: Build Fuzzers (${{ matrix.sanitizer }})
+     id: build
+     uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+     with:
+       oss-fuzz-project-name: 'flac'
+       language: c++
+       sanitizer: ${{ matrix.sanitizer }}
+   - name: Run Fuzzers (${{ matrix.sanitizer }})
+     uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+     with:
+       oss-fuzz-project-name: 'flac'
+       language: c++
+       fuzz-seconds: 3600
+       sanitizer: ${{ matrix.sanitizer }}
+   - name: Upload Crash
+     uses: actions/upload-artifact@v1
+     if: failure() && steps.build.outcome == 'success'
+     with:
+       name: ${{ matrix.sanitizer }}-artifacts
+       path: ./out/artifacts
+