Revert to simpler strategy of simply ignoring when arch != x86|x64.

Author: c272

eng/Subsets.props

@@ -276,7 +276,7 @@
     <CrossDacHostArch Condition="'$(TargetArchitecture)' == 'arm'">x86</CrossDacHostArch>
   </PropertyGroup>
 
-  <ItemGroup Condition="$(_subset.Contains('+linuxdac+')) and $([MSBuild]::IsOsPlatform(Windows)) and '$(BuildArchitecture)' != '$(TargetArchitecture)' and ('$(BuildArchitecture)' != 'x64' or '$(TargetArchitecture)' != 'x86')">
+  <ItemGroup Condition="$(_subset.Contains('+linuxdac+')) and $([MSBuild]::IsOsPlatform(Windows))  and ('$(BuildArchitecture)' == 'x64' or '$(BuildArchitecture)' == 'x86') and '$(TargetArchitecture)' != 'x86'">
     <ProjectToBuild
       Include="$(CoreClrProjectRoot)runtime.proj"
       AdditionalProperties="%(AdditionalProperties);
@@ -288,7 +288,7 @@
                             CMakeArgs=$(CMakeArgs) -DCLR_CROSS_COMPONENTS_BUILD=1" Category="clr" />
   </ItemGroup>
 
-  <ItemGroup Condition="$(_subset.Contains('+alpinedac+')) and $([MSBuild]::IsOsPlatform(Windows)) and '$(BuildArchitecture)' != '$(TargetArchitecture)' and ('$(BuildArchitecture)' != 'x64' or '$(TargetArchitecture)' != 'x86')">
+  <ItemGroup Condition="$(_subset.Contains('+alpinedac+')) and $([MSBuild]::IsOsPlatform(Windows)) and ('$(BuildArchitecture)' == 'x64' or '$(BuildArchitecture)' == 'x86') and '$(TargetArchitecture)' != 'x86'">
     <ProjectToBuild
       Include="$(CoreClrProjectRoot)runtime.proj"
       AdditionalProperties="%(AdditionalProperties);