Add libc++.so.1 to runtime.Linux.Microsoft.NETCore.Runtime.Mono.LLVM.Libclang.props

Author: akoeplinger

nuget/Microsoft.NETCore.Runtime.Mono.LLVM.Libclang/runtime.Linux.Microsoft.NETCore.Runtime.Mono.LLVM.Libclang.props

@@ -3,6 +3,8 @@
   <ItemGroup>
     <File Include="$(ProjectDir)\clang\bindings\python\clang\**" TargetPath="tools\bindings\python\clang" />
     <File Include="$(_LLVMInstallDir)\lib\libclang.so" TargetPath="tools\libclang.so" />
+    <File Include="$(_LibCxxInstallDir)\lib\libc++.so.1" TargetPath="tools" />
+    <File Include="$(_LibCxxInstallDir)\lib\libc++abi.so.1" TargetPath="tools" />
     <File Include="$(_LLVMInstallDir)\lib\clang\$(LLVMVersionShort)\include\**" TargetPath="tools\include\%(RecursiveDir)" />
   </ItemGroup>
 </Project>