Add MultiProcessorCompilation

Common.Build.props

@@ -7,6 +7,7 @@
       <TreatWarningAsError>true</TreatWarningAsError>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <ConformanceMode>true</ConformanceMode>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <!-- By default, make Windows.h as lean as possible, enabling only what we know we need -->
       <PreprocessorDefinitions>
         NOGDICAPMASKS;