fix(cpp): add missing ARM64 PCH create/use overrides in RDPWrap.vcxproj

stdafx.cpp had PrecompiledHeader=Create for Debug|Win32, Debug|x64,
Release|Win32, Release|x64 but not Release|ARM64. MSBuild fell through
to the ItemDefinitionGroup default of Use, tried to open a PCH that
was never generated, and all four TUs failed with C1083.

dllmain.cpp also lacked the empty-PrecompiledHeader override for
Release|ARM64 (disabling PCH for that TU), inconsistent with the
other three platforms where it deliberately does not use the PCH.

src-x86-x64-Fusix/RDPWrap.vcxproj

@@ -220,6 +220,9 @@
       </PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
       </PrecompiledHeader>
+      <CompileAsManaged Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">false</CompileAsManaged>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+      </PrecompiledHeader>
     </ClCompile>
     <ClCompile Include="IniFile.cpp" />
     <ClCompile Include="RDPWrap.cpp" />
@@ -228,6 +231,7 @@
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Create</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Create</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">Create</PrecompiledHeader>
     </ClCompile>
   </ItemGroup>
   <ItemGroup>