add x86 test run (#2528)

.github/workflows/go.yml

@@ -41,6 +41,34 @@ jobs:
     - name: Test
       run: make ci-test-no-generate
 
+  x86-tests:
+    name: Unix x86 SDK tests
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        go-version: ["1.22"]
+    env:
+      GOARCH: "386"
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go-version }}
+
+    - name: Find smithy-go
+      env:
+        RUNNER_TMPDIR: ${{ runner.temp }}
+      run: ./ci-find-smithy-go.sh
+
+    - name: Install golint
+      run: go install golang.org/x/lint/golint@latest
+
+    - name: Test
+      run: make unit
+
   windows-tests:
     name: Windows SDK Tests
     runs-on: ${{ matrix.os }}