build: [gn] fix node header generation target in appveyor (#14218)

* build: [gn] fix node header generation target in appveyor

* build: fix tests run on AppVeyor

* build: [gn win] copy node.lib to node_headers on appveyor

* Fix verify-ffmpeg paths

appveyor-gn.yml

@@ -35,14 +35,19 @@ build_script:
   - ninja -C out/ffmpeg third_party/ffmpeg
   - ninja -C out/Default electron:electron_dist_zip
 test_script:
-  - ninja -C out/Default electron/build/node:headers
+  - ninja -C out/Default third_party/electron_node:headers
   - ps: $env:npm_config_nodedir="$pwd/out/Default/gen/node_headers"
   - ps: $env:npm_config_msvs_version="2017"
+  - ps: >-
+      if ($env:gn_args -eq 'testing') {
+        New-Item .\out\Default\gen\node_headers\Release -Type directory
+        Copy-Item -path .\out\Default\electron.lib -destination .\out\Default\gen\node_headers\Release\node.lib
+      }
   - ps: Push-Location; cd electron/spec
   - npm install
   - ps: Pop-Location
-  - ./out/Default/electron.exe electron/spec --ci
-  - python src\electron\verify-ffmpeg.py -c Default --source-root "%pwd%\src" --ffmpeg-path "%pwd%\src\out\ffmpeg"
+  - .\out\Default\electron.exe electron\spec --ci
+  - python electron\verify-ffmpeg.py -c Default --source-root "%pwd%" --ffmpeg-path "%pwd%\out\ffmpeg"
 artifacts:
 - path: test-results.xml
   name: test-results.xml