build: move windows bindings to i686-pc-win32 directory

Move windows bindings to i686-pc-win32, the same way as osx bindings are
(and linux bindings will be).

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@iki.fi>

src/CppParser/Bindings/premake4.lua

@@ -26,10 +26,12 @@ project "CppSharp.Parser.CSharp"
 
   links { "CppSharp.Runtime" }
 
-  if os.is_osx() then
+  if os.is_windows() then
+      files { "CSharp/i686-pc-win32/**.cs" }
+  elseif os.is_osx() then
       files { "CSharp/i686-apple-darwin12.4.0/**.cs" }
   else
-      files { "CSharp/*.cs" }
+      print "Unknown architecture"
   end
 
   configuration ""