[RuntimeDydlELF] Use range-based loop

[davide]

Summary

Stumbled upon this while experimenting LLD section-based ELF backend.

[• rafael]

Lgtm

lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp

   // relocation) without a .toc directive.  In this case just use the
   // first section (which is usually the .odp) since the code won't
   // reference the .toc base directly.
   Rel.SymbolName = NULL;
   Rel.SectionID = 0;
 
   // The TOC consists of sections .got, .toc, .tocbss, .plt in that
   // order. The TOC starts where the first of these sections starts.
-  for (section_iterator si = Obj.section_begin(), se = Obj.section_end();
-       si != se; ++si) {
-
+  for (auto &Section: Obj.sections()) {
     StringRef SectionName;
-    check(si->getName(SectionName));
+    check(Section.getName(SectionName));
 
     if (SectionName == ".got"
         || SectionName == ".toc"
         || SectionName == ".tocbss"
         || SectionName == ".plt") {
-      Rel.SectionID = findOrEmitSection(Obj, *si, false, LocalSections);
+      Rel.SectionID = findOrEmitSection(Obj, Section, false, LocalSections);
       break;
     }
   }
 
   // Per the ppc64-elf-linux ABI, The TOC base is TOC value plus 0x8000
   // thus permitting a full 64 Kbytes segment.
   Rel.Addend = 0x8000;
 }