tools: ignore VS compiler output in deps/v8

PR-URL: #18952
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

.gitignore

@@ -122,3 +122,8 @@ deps/uv/docs/src/guide/
 
 # do not override V8's .gitignore
 !deps/v8/**
+# ignore VS compiler output unhandled by V8's .gitignore
+deps/v8/src/Debug/
+deps/v8/src/Release/
+deps/v8/src/inspector/Debug/
+deps/v8/src/inspector/Release/