Fix build against musl

Author: ayakael

Diff for: src/System.CommandLine.Suggest.Tests/dotnet-suggest.Tests.csproj

@@ -38,6 +38,15 @@
 
   <Target Name="DotnetSuggestIntegrationTestAssets" BeforeTargets="Build" Condition="'$(Configuration)' == 'Release'">
 
+      <Exec IgnoreExitCode="true" Command="ldd --version 2&gt;&amp;1 | grep -q musl">
+        <Output TaskParameter="ExitCode" PropertyName="OSPlatformIsMuslCheck" />
+      </Exec>
+
+      <PropertyGroup>
+        <OSPlatformIsMusl Condition="$(OSPlatformIsMuslCheck) == '0'">true</OSPlatformIsMusl>
+        <OSPlatformIsMusl Condition="$(OSPlatformIsMusl) == ''">false</OSPlatformIsMusl>
+      </PropertyGroup>
+
       <PropertyGroup>
         <TestAssetsPath>
           $([System.IO.Path]::GetFullPath('$(OutputPath)'))/TestAssets
@@ -56,6 +65,10 @@
         <Rid>linux-x64</Rid>
       </PropertyGroup>
 
+      <PropertyGroup Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::Linux)))' == 'true' AND '$(OSPlatformIsMusl)' == 'true'">
+        <Rid>linux-musl-x64</Rid>
+      </PropertyGroup>
+
       <MSBuild BuildInParallel="False" Projects="../System.CommandLine.Suggest/dotnet-suggest.csproj" Targets="Restore" Properties="UseAppHost=true;SelfContained=false;RuntimeIdentifier=$(Rid);ForceRestoreToEvaluateSeparately=1;Configuration=Release">
       </MSBuild>
 

Diff for: src/System.CommandLine.Suggest/dotnet-suggest.csproj

@@ -6,7 +6,7 @@
     <PackAsTool>true</PackAsTool>
     <PackageId>dotnet-suggest</PackageId>
     <ToolCommandName>dotnet-suggest</ToolCommandName>
-    <PackAsToolShimRuntimeIdentifiers>win-x64;win-x86;osx-x64;linux-x64</PackAsToolShimRuntimeIdentifiers>
+    <PackAsToolShimRuntimeIdentifiers>win-x64;win-x86;osx-x64;linux-x64;linux-musl-x64</PackAsToolShimRuntimeIdentifiers>
     <PackagedShimOutputRootDirectory>$(OutputPath)</PackagedShimOutputRootDirectory>
 
     <DotnetSuggestBuildNumber>.1</DotnetSuggestBuildNumber>