[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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304446 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed