fix vs2019 some option not set

scripts/toolchain.lua

@@ -411,6 +411,7 @@ function toolchain(_buildDir, _libDir)
 		or _ACTION == "vs2013"
 		or _ACTION == "vs2015"
 		or _ACTION == "vs2017"
+		or _ACTION == "vs2019"
 		then
 
 		local action = premake.action.current()