[Clang] Pass -fseparate-named-sections from the driver

This is a follow up to llvm#91028.

Author: petrhosek

clang/lib/Driver/ToolChains/Clang.cpp

@@ -6116,6 +6116,8 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
 
   Args.addOptOutFlag(CmdArgs, options::OPT_funique_section_names,
                      options::OPT_fno_unique_section_names);
+  Args.addOptInFlag(CmdArgs, options::OPT_fseparate_named_sections,
+                    options::OPT_fno_separate_named_sections);
   Args.addOptInFlag(CmdArgs, options::OPT_funique_internal_linkage_names,
                     options::OPT_fno_unique_internal_linkage_names);
   Args.addOptInFlag(CmdArgs, options::OPT_funique_basic_block_section_names,