Moved CreateAliasMapping to correct target

Author: MiYanni

build.proj

@@ -257,8 +257,6 @@
     <!-- Investigate why the ChangeLogCheck target removes the 8080th character -->
     <!-- <CallTarget targets="ChangeLogCheck" ContinueOnError="false" /> -->
 
-    <Exec Command="$(PowerShellCommandPrefix) &quot;$ProgressPreference = 'SilentlyContinue';. $(LibraryToolsFolder)\CreateAliasMapping.ps1 &quot;"/>
-
     <MakeDir  Directories="$(PackageDirectory)"
               Condition="'$(Scope)' != 'Stack'" />
     <MakeDir  Directories="$(StackPackageFolder)"
@@ -357,6 +355,8 @@
   <Target Name="BuildNetCore">
     <Message Importance="high" Text="Building Cmdlets..." />
 
+    <Exec Command="$(PowerShellCommandPrefix) &quot;$ProgressPreference = 'SilentlyContinue';. $(LibraryToolsFolder)\CreateAliasMapping.ps1 &quot;"/>
+
     <!-- Build and create package content -->
     <Exec Command="dotnet --version"/>
     <Exec Command="dotnet publish Azure.PowerShell.Netcore.sln -c $(Configuration)"/>