Roslyn patch to fix NetRoslyn value

Author: mthalman

src/SourceBuild/patches/roslyn/0001-Set-NetRoslyn-value-for-VMR-build.patch

@@ -0,0 +1,22 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Matt Thalman <mthalman@microsoft.com>
+Date: Fri, 23 Feb 2024 09:48:43 -0600
+Subject: [PATCH] Set NetRoslyn value for VMR build
+
+Backport: https://github.com/dotnet/roslyn/pull/71704
+---
+ eng/targets/TargetFrameworks.props | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/eng/targets/TargetFrameworks.props b/eng/targets/TargetFrameworks.props
+index a7643fcbcfd..054428128b3 100644
+--- a/eng/targets/TargetFrameworks.props
++++ b/eng/targets/TargetFrameworks.props
+@@ -51,6 +51,7 @@
+         <NetRoslynToolset>$(NetCurrent)</NetRoslynToolset>
+         <NetRoslynSourceBuild>$(NetCurrent);$(NetPrevious)</NetRoslynSourceBuild>
+         <NetRoslynAll>$(NetCurrent);$(NetPrevious)</NetRoslynAll>
++        <NetRoslyn>$(NetCurrent)</NetRoslyn>
+         <NetRoslynBuildHostNetCoreVersion>$(NetCurrent)</NetRoslynBuildHostNetCoreVersion>
+       </PropertyGroup>
+     </When>