Revert "[llvm-objdump] Printing relocations in executable and shared object files.  This partially reverts r215844 by removing test objdump-reloc-shared.test which stated GNU objdump doesn't print relocations, it does."

This reverts commit r263971.
It produces the wrong results for .rela.dyn. I will add a test.

llvm-svn: 263987
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
index 7f49efd..f436183 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -1188,6 +1188,10 @@
 void llvm::PrintRelocations(const ObjectFile *Obj) {
   StringRef Fmt = Obj->getBytesInAddress() > 4 ? "%016" PRIx64 :
                                                  "%08" PRIx64;
+  // Regular objdump doesn't print relocations in non-relocatable object
+  // files.
+  if (!Obj->isRelocatableObject())
+    return;
 
   for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
     if (Section.relocation_begin() == Section.relocation_end())