build: fix LolFx rule for MSBuild again.

build/vs2010/Lol.Fx.props

@@ -14,7 +14,7 @@
       <CommandLineTemplate>@echo off
 set D=$(IntDir)%(Filename)%(Extension).cpp
 echo /* This file was autogenerated. DO NOT MODIFY IT. */ &gt; "%D%"
-echo char const *lolfx_resource_%(Filename) = &gt;&gt; "%D%"
+echo extern "C" { char const *lolfx_resource_%(Filename) = &gt;&gt; "%D%"
 setlocal disabledelayedexpansion
 for /F "tokens=1,* delims=`" %%L in ('type "%(Fullpath)"') do (
   set "line=%%L"
@@ -23,7 +23,7 @@ for /F "tokens=1,* delims=`" %%L in ('type "%(Fullpath)"') do (
   endlocal
 )
 endlocal
-echo ; &gt;&gt; "%D%"</CommandLineTemplate>
+echo ;} &gt;&gt; "%D%"</CommandLineTemplate>
       <Outputs>$(IntDir)%(FileName)%(Extension).cpp</Outputs>
       <ExecutionDescription>%(FileName)%(Extension)</ExecutionDescription>
     </LolFxCompile>