Add scottmg to depot_tools/win_toolchain OWNERS

R=dpranke@chromium.org

Review URL: https://codereview.chromium.org/771233002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@293192 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/win_toolchain/OWNERS b/win_toolchain/OWNERS
new file mode 100644
index 0000000..3f809e8
--- /dev/null
+++ b/win_toolchain/OWNERS
@@ -0,0 +1 @@
+scottmg@chromium.org