Suppress compiler warnings in Mono.Cecil.Pdb.

Mono.Cecil/symbols/pdb/Mono.Cecil.Pdb.csproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">net_4_0_Debug</Configuration>
@@ -13,6 +13,7 @@
     <FileAlignment>512</FileAlignment>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\mono.snk</AssemblyOriginatorKeyFile>
+    <NoWarn>0649</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'net_2_0_Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>