fixed bug: option's default value must be among the list of allowed values -- removing <values> list to fix this

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38880 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

build/bakefiles/config.bkl

@@ -79,7 +79,6 @@
 
     <if cond="FORMAT=='msvc'">
         <option name="TARGET_CPU">
-            <values>AMD64,IA64</values>
             <default-value>$(DOLLAR)(CPU)</default-value>
             <description>
 The target processor architecture must be specified when it is not X86.
@@ -87,6 +86,8 @@ This does not affect the compiler output, so you still need to make sure
 your environment is set up appropriately with the correct compiler in the
 PATH. Rather it affects some options passed to some of the common build
 utilities such as the resource compiler and the linker.
+
+Accepted values: AMD64, IA64.
             </description>
         </option>
     </if>