Enable tail call generation for test Runtime_87393 (#100593)

To pass the test needs to be built with --tailcalls compiler flag enabled.

Author: rzsc

src/tests/JIT/Regression/JitBlue/Runtime_87393/Runtime_87393.fsproj

@@ -7,6 +7,7 @@
     <Optimize>True</Optimize>
     <TargetFramework>$(NetCoreAppToolCurrent)</TargetFramework>
     <GCStressIncompatible>True</GCStressIncompatible>
+    <OtherFlags>--tailcalls+</OtherFlags>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="$(MSBuildProjectName).fs" />