tools: ignore VS compiler output

Add gitignore rules to ignore compiler output under deps/v8/gypfiles.

PR-URL: #20527
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>

Author: fs-eire

.gitignore

@@ -123,6 +123,8 @@ deps/uv/docs/src/guide/
 # do not override V8's .gitignore
 !deps/v8/**
 # ignore VS compiler output unhandled by V8's .gitignore
+deps/v8/gypfiles/Debug/
+deps/v8/gypfiles/Release/
 deps/v8/src/Debug/
 deps/v8/src/Release/
 deps/v8/src/inspector/Debug/