Fix casing of shared and add DT_DIR to readdir

src/corehost/cli/fxr/fx_muxer.cpp

@@ -29,7 +29,7 @@ pal::string_t fx_muxer_t::resolve_fx_dir(const pal::string_t& muxer_dir, runtime
     }
 
     auto fx_dir = muxer_dir;
-    append_path(&fx_dir, _X("Shared"));
+    append_path(&fx_dir, _X("shared"));
     append_path(&fx_dir, fx_name.c_str());
 
     // If not roll forward or if pre-release, just return.

src/corehost/common/pal.unix.cpp

@@ -202,6 +202,7 @@ void pal::readdir(const pal::string_t& path, std::vector<pal::string_t>* list)
             // We are interested in files only
             switch (entry->d_type)
             {
+            case DT_DIR:
             case DT_REG:
                 break;