protoc.exe使用最小的release版，修正protobuf库的输出目录到ET/Bin下

Server/ThirdParty/Google.Protobuf/Google.Protobuf.csproj

@@ -5,6 +5,12 @@
     <ApplicationIcon />
     <StartupObject />
   </PropertyGroup>
+  <PropertyGroup>
+  	<AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <OutputPath>..\..\..\Bin\</OutputPath>
+  </PropertyGroup>
   <ItemGroup>
     <Compile Include="..\..\..\Unity\Assets\ThirdParty\Google.Protobuf\ByteArray.cs" Link="ByteArray.cs" />
     <Compile Include="..\..\..\Unity\Assets\ThirdParty\Google.Protobuf\ByteString.cs" Link="ByteString.cs" />