gn: Fix build issues blocking gfx from being built

build/toolchain/win/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/win/visual_studio_version.gni")
 import("//build/toolchain/goma.gni")
 
 # Should only be running on Windows.
 assert(is_win)
 
@@ skipping 93 matching lines @@
       #manifest_command = "$python_path gyp-win-tool manifest-wrapper $env mt.exe -nologo -manifest $manifests -out:${dllname}.manifest"
       #command = "cmd /c $link_command && $manifest_command"
       command = link_command
 
       default_output_extension = ".dll"
       description = "LINK(DLL) {{output}}"
       outputs = [
         dllname,
         libname,
       ]
+      link_output = libname
+      depend_output = libname
       # The use of inputs_newline is to work around a fixed per-line buffer
       # size in the linker.
       rspfile_content = "{{libs}} {{solibs}} {{inputs_newline}} {{ldflags}}"
     }
 
     tool("link") {
       rspfile = "{{output}}.rsp"
 
       link_command = "$python_path gyp-win-tool link-wrapper $env False link.exe /nologo /OUT:{{output}} /PDB:{{output}}.pdb @$rspfile"
 
@@ skipping 39 matching lines @@
 msvc_toolchain("32") {
   environment = "environment.x86"
   cpu_arch = "x64"
 }
 
 msvc_toolchain("64") {
   environment = "environment.x64"
   cpu_arch = "x64"
   force_win64 = true
 }