[DWARF] Introduce Dump Options

This commit introduces a structure that holds all the flags that
control the pretty printing of dwarf output.

Patch by Spyridoula Gravani!

Differential Revision: https://reviews.llvm.org/D33749

llvm-svn: 304446
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
index 18fa0e0..6a91515 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -2064,7 +2064,10 @@
   if (DwarfDumpType != DIDT_Null) {
     std::unique_ptr<DIContext> DICtx(new DWARFContextInMemory(*o));
     // Dump the complete DWARF structure.
-    DICtx->dump(outs(), DwarfDumpType, true /* DumpEH */);
+    DIDumpOptions DumpOpts;
+    DumpOpts.DumpType = DwarfDumpType;
+    DumpOpts.DumpEH = true;
+    DICtx->dump(outs(), DumpOpts);
   }
 }