Fix build in Visual Studio

Building in Visual Studio causes some tasks to be run concurrently that
would be run in a specific order in MSBuild instead. The symptom would
look like this:

	MSB4044: The "GenerateWindowsAppManifest" task was not given a
	value for the required parameter "Version".

Let's help Visual Studio realize that there are certain dependencies
between the `GetVersion` and the `GenerateWindowsAppManifest` task.

Reported by Michael J. Lyons.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

Directory.Build.targets

@@ -6,7 +6,7 @@
   <Import Project="$(RepoPath)build\GCM.tasks" />
 
   <!-- Use version specified in VERSION file -->
-  <Target Name="GetVersion" BeforeTargets="BeforeBuild">
+  <Target Name="GetVersion" BeforeTargets="BeforeBuild;GenerateWindowsAppManifest">
     <GetVersion VersionFile="$(RepoPath)VERSION">
       <Output TaskParameter="Version" PropertyName="Version" />
       <Output TaskParameter="AssemblyVersion" PropertyName="AssemblyVersion" />
@@ -21,6 +21,7 @@
 
   <!-- Generate the manifest file before we set the win32 manifest properties -->
   <Target Name="GenerateWindowsAppManifest"
+		  AfterTargets="GetVersion"
           BeforeTargets="SetWin32ManifestProperties"
           Condition="'$(GenerateWindowsAppManifest)' != 'false'"
           Inputs="$(FileVersion);$(AssemblyName)"