Add comments.

This patch rearranges code a bit to make it easy to explain.

llvm-svn: 287515
diff --git a/lld/ELF/LinkerScript.h b/lld/ELF/LinkerScript.h
index a4bade0..d6dae4d 100644
--- a/lld/ELF/LinkerScript.h
+++ b/lld/ELF/LinkerScript.h
@@ -224,7 +224,7 @@
   ~LinkerScript();
 
   void processCommands(OutputSectionFactory<ELFT> &Factory);
-  void createSections(OutputSectionFactory<ELFT> &Factory);
+  void addOrphanSections(OutputSectionFactory<ELFT> &Factory);
   void removeEmptyCommands();
   void adjustSectionsBeforeSorting();
   void adjustSectionsAfterSorting();