Update GN docs about Visual Studio generators

tools/gn/docs/faq.md

Index: tools/gn/docs/faq.md
diff --git a/tools/gn/docs/faq.md b/tools/gn/docs/faq.md
index cd32f6ad842a417e67c1bbd5b0a84c539d0b8f02..691952b0cf582b55316db8b6838381357dde64dc 100644
--- a/tools/gn/docs/faq.md
+++ b/tools/gn/docs/faq.md
@@ -31,15 +31,11 @@ individuals manually setting GYP\_DEFINES on their local system.
 
 ## Will XCode/Visual Studio still be supported?
 
-They're not supported now.
-
-Long-term, if your use-case is to use Ninja for building but Visual
-Studio or XCode for debugging, there is desire to write a simple wrapper
-around Ninja that lists the files in Visual Studio or XCode format, and
-has a command to run ninja for when you press build. This setup should
-provide the type of interactive debugging experience people want (the
-iOS team currently uses a Ninja/XCode build like this with success).
+Visual Studio is supported. Visual Studio can be used as an IDE for code
+browsing or debugging but Ninja is used for building.
+Run `gn help gen` for more details.
 
+XCode is not supported now.

[brettw, 2016/02/29 18:01:05]

Can you change this to "XCode is not supported yet. We need help!"

And then delete the following paragraph about "This project is not staffed..."
since that doc link seems dead anyway.

[Tomasz Moniuszko, 2016/03/01 08:57:25]

Done.

 This project is not staffed. If you're interested, it probably isn't too
 hard. It won't get done unless somebody volunteers. There is a [spec for
 IDE