Fix MDP load hints

Signed-off-by: José Simões <jose.simoes@eclo.solutions>

Author: josesimoes

source/nanoFramework.Networking.Sntp/nanoFramework.Networking.Sntp.nfproj

@@ -44,7 +44,7 @@
     <Name>nanoFramework.Networking.Sntp</Name>
   </PropertyGroup>
   <ItemGroup>
-    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.0.4\lib\mscorlib.dll">
+    <NFMDP_PE_LoadHints Include="..\packages\nanoFramework.CoreLibrary.1.0.5-preview024\lib\mscorlib.dll">
       <InProject>false</InProject>
     </NFMDP_PE_LoadHints>
   </ItemGroup>
@@ -61,6 +61,7 @@
     <Reference Include="mscorlib, Version=1.0.5.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\packages\nanoFramework.CoreLibrary.1.0.5-preview024\lib\mscorlib.dll</HintPath>
       <Private>True</Private>
+      <SpecificVersion>True</SpecificVersion>
     </Reference>
   </ItemGroup>
   <Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />