Move Swix dependency after target import

The Swix dependency is linked via a "BeforeBuild" target. The targets
file for SWIX unconditionally overrides this target. Hence the
definition must be after.

src/Setup/DevDivVsix/CompilersPackage/Microsoft.CodeAnalysis.Compilers.vsmanproj

@@ -16,16 +16,16 @@
 
   <Import Project="$(SwixBuildPath)build\MicroBuild.Plugins.*.props" />
 
-  <Target Name="BeforeBuild">
-    <MSBuild Projects="Microsoft.CodeAnalysis.Compilers.swixproj" Targets="Build" />
-  </Target>
-
   <ItemGroup>
     <MergeManifest Include="$(OutputPath)\Microsoft.CodeAnalysis.Compilers.json" />
   </ItemGroup>
 
   <Import Project="$(SwixBuildPath)build\MicroBuild.Plugins.*.targets" />
 
+  <Target Name="BeforeBuild">
+    <MSBuild Projects="Microsoft.CodeAnalysis.Compilers.swixproj" Targets="Build" />
+  </Target>
+
   <Target Name="ValidateManifest" />
 
   <!-- Disable automatic signing. This will be signed in the batch phase -->

src/Setup/DevDivVsix/PortableFacades/PortableFacades.vsmanproj

@@ -16,16 +16,16 @@
 
   <Import Project="$(SwixBuildPath)build\MicroBuild.Plugins.*.props" />
 
-  <Target Name="BeforeBuild">
-    <MSBuild Projects="PortableFacades.swixproj" Targets="Build" />
-  </Target>
-
   <ItemGroup>
     <MergeManifest Include="$(OutputPath)PortableFacades.json" />
   </ItemGroup>
 
   <Import Project="$(SwixBuildPath)build\MicroBuild.Plugins.*.targets" />
 
+  <Target Name="BeforeBuild">
+    <MSBuild Projects="PortableFacades.swixproj" Targets="Build" />
+  </Target>
+
   <Target Name="ValidateManifest" />
 
   <!-- Disable automatic signing. This will be signed in the batch phase -->