Carry over the windows_subsystem setting to the generated vsproj if it's not the default.

Even if you specify the subsystem to be the console one, the vsproj doesn't carry over the setting, which makes working with this mode in the IDE a bit annoying since it'll regenerate the vsproj right afterwards. Since there's only two options and 'gui' is the default, we only carry over the 'console' setting.

(cherry picked from commit cda4b4ebf3d6328c3987d4dd9e7df356a996541f)

methods.py

@@ -868,6 +868,9 @@ def generate_vs_project(env, num_jobs, project_name="godot"):
                 if env["custom_modules"]:
                     common_build_postfix.append("custom_modules=%s" % env["custom_modules"])
 
+                if env["windows_subsystem"] == "console":
+                    common_build_postfix.append("windows_subsystem=console")
+
                 if env["precision"] == "double":
                     common_build_postfix.append("precision=double")