ci: fix windows symbol gen

appveyor.yml

@@ -38,7 +38,10 @@ build_script:
   - ps: >-
       if ($env:GN_CONFIG -eq 'release') {
         ninja -C out/Default third_party/breakpad:dump_syms
-        python electron\script\dump-symbols.py -d %cd%/out/Default/electron.breakpad.syms
+      }
+  - if "%GN_CONFIG%"=="release" ( python electron\script\dump-symbols.py -d %cd%\out\Default\electron.breakpad.syms -v)
+  - ps: >-
+      if ($env:GN_CONFIG -eq 'release') {
         python electron\script\zip-symbols.py
         appveyor PushArtifact out/Default/electron.breakpad.syms
       }
@@ -66,4 +69,4 @@ deploy_script:
           Write-Output "Uploading Electron release distribution to github releases"
           & python script\upload.py
         }
-      }
+      }