Disable Whole Program Optimization

This allows linking obj files built with different toolsets I think.

src/syncterm/SyncTERM.vcxproj

@@ -27,7 +27,7 @@
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
     <PlatformToolset>v143</PlatformToolset>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <WholeProgramOptimization>false</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />