Fix lldb test on lib64 systems

[teemperor]

LGTM, thanks!

lldb/unittests/Expression/ClangParserTest.cpp

 //===-- ClangParserTest.cpp -----------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #include "clang/Basic/Version.h"
 
 #include "Plugins/ExpressionParser/Clang/ClangHost.h"
 #include "TestingSupport/SubsystemRAII.h"
 #include "TestingSupport/TestUtilities.h"
+#include "lldb/Host/Config.h"
 #include "lldb/Host/FileSystem.h"
 #include "lldb/Host/HostInfo.h"
 #include "lldb/Utility/FileSpec.h"
 #include "lldb/lldb-defines.h"
 #include "gtest/gtest.h"
 
 using namespace lldb_private;
 
static std::string ComputeClangResourceDir(std::string lldb_shlib_path,
   FileSpec lldb_shlib_spec(lldb_shlib_path);
   ComputeClangResourceDirectory(lldb_shlib_spec, clang_dir, verify);
   return clang_dir.GetPath();
 }
 
 TEST_F(ClangHostTest, ComputeClangResourceDirectory) {
 #if !defined(_WIN32)
   std::string path_to_liblldb = "/foo/bar/lib/";
-  std::string path_to_clang_dir = "/foo/bar/lib/clang/" CLANG_VERSION_STRING;
+  std::string path_to_clang_dir = "/foo/bar/lib" LLDB_LIBDIR_SUFFIX "/clang/" CLANG_VERSION_STRING;
 #else
   std::string path_to_liblldb = "C:\\foo\\bar\\lib";
   std::string path_to_clang_dir = "C:\\foo\\bar\\lib\\clang\\" CLANG_VERSION_STRING;
 #endif
   EXPECT_EQ(ComputeClangResourceDir(path_to_liblldb), path_to_clang_dir);
 
   // The path doesn't really exist, so setting verify to true should make
   // ComputeClangResourceDir not give you path_to_clang_dir.