[Object] Add {begin,end}_dynamic_symbols stubs and implementation for ELF.
Add -D option to llvm-nm to dump dynamic symbols.

Patch by David Meyer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151600 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Object/MachOObjectFile.cpp b/lib/Object/MachOObjectFile.cpp
index 4fa621b..b1416ea 100644
--- a/lib/Object/MachOObjectFile.cpp
+++ b/lib/Object/MachOObjectFile.cpp
@@ -388,6 +388,15 @@
   return symbol_iterator(SymbolRef(DRI, this));
 }
 
+symbol_iterator MachOObjectFile::begin_dynamic_symbols() const {
+  // TODO: implement
+  report_fatal_error("Dynamic symbols unimplemented in MachOObjectFile");
+}
+
+symbol_iterator MachOObjectFile::end_dynamic_symbols() const {
+  // TODO: implement
+  report_fatal_error("Dynamic symbols unimplemented in MachOObjectFile");
+}
 
 /*===-- Sections ----------------------------------------------------------===*/