GN: Update Windows SDK version to 10586 in generated project files

tools/gn/visual_studio_writer.cc

Index: tools/gn/visual_studio_writer.cc
diff --git a/tools/gn/visual_studio_writer.cc b/tools/gn/visual_studio_writer.cc
index dec083753f79052cdc6a8a0ef80a75cfacf5d739..b1834165cc87e299820b27c0a10fff6736fe3bba 100644
--- a/tools/gn/visual_studio_writer.cc
+++ b/tools/gn/visual_studio_writer.cc
@@ -67,7 +67,7 @@ struct SourceFileWriter {
 const char kToolsetVersion[] = "v140";                     // Visual Studio 2015
 const char kVisualStudioVersion[] = "14.0";                // Visual Studio 2015
 const char kWindowsKitsVersion[] = "10";                   // Windows 10 SDK
-const char kWindowsKitsIncludeVersion[] = "10.0.10240.0";  // Windows 10 SDK
+const char kWindowsKitsIncludeVersion[] = "10.0.10586.0";  // Windows 10 SDK
 
 const char kGuidTypeProject[] = "{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}";
 const char kGuidTypeFolder[] = "{2150E333-8FDC-42A3-9474-1A3956D46DE8}";