Update code-gen projs

Author: mythz

src/ServiceStack.Text/ServiceStack.Text.PCL.csproj

@@ -254,6 +254,7 @@
     <Compile Include="XmlSerializer.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="ParseAsType.cs" />
   </ItemGroup>
   <!--ItemGroup,Content-->
   <!--ItemGroup,None-->

src/ServiceStack.Text/ServiceStack.Text.SL5.csproj

@@ -277,6 +277,7 @@
     <Compile Include="XmlSerializer.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="ParseAsType.cs" />
   </ItemGroup>
   <!--ItemGroup,Content-->
   <!--ItemGroup,None-->

src/ServiceStack.Text/ServiceStack.Text.Signed.csproj

@@ -309,6 +309,7 @@
     <Compile Include="XmlSerializer.cs">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="ParseAsType.cs" />
   </ItemGroup>
   <ItemGroup>
     <BootstrapperPackage Include="Microsoft.Net.Client.3.5">