Updated the git ignore list

Ignore /usb and /gameplay/windows

.gitignore

@@ -9,6 +9,7 @@ Icon?
 Thumbs.db
 /.metadata
 /169.254.0.1
+/usb
 /ipch
 /build
 /cmake
@@ -46,6 +47,7 @@ Thumbs.db
 /gameplay/Device-Release
 /gameplay.xcworkspace/xcuserdata
 /gameplay/gameplay.xcodeproj/xcuserdata
+/gameplay/windows
 /gameplay/android/NUL
 /gameplay/android/proguard.cfg
 /gameplay/android/proguard-project.txt