[CI] Add x86 build check for camera app (#37680)

Author: yufengwangca

.github/workflows/examples-linux-standalone.yaml

@@ -228,7 +228,17 @@ jobs:
                   .environment/pigweed-venv/bin/python3 scripts/tools/memory/gh_sizes.py \
                     linux debug fabric-sync \
                     out/linux-x64-fabric-sync-no-ble/fabric-sync \
-                    /tmp/bloat_reports/                    
+                    /tmp/bloat_reports/
+            - name: Build example Camera App
+              run: |
+                  ./scripts/run_in_build_env.sh \
+                     "./scripts/build/build_examples.py \
+                        --target linux-x64-camera \
+                        build"
+                  .environment/pigweed-venv/bin/python3 scripts/tools/memory/gh_sizes.py \
+                    linux debug camera-app \
+                    out/linux-x64-camera/chip-camera-app \
+                    /tmp/bloat_reports/                                     
             - name: Uploading Size Reports
               uses: ./.github/actions/upload-size-reports
               if: ${{ !env.ACT }}