Revert "Revert "Add small library for writing of DWARF data.""

Use objdump from prebuilts.

This reverts commit 1ded5beffa4bae6203e1fa03903c6ffa2766bf4c.

Change-Id: I91f61a91827406930039ccf8691359b1c2636640
diff --git a/build/Android.gtest.mk b/build/Android.gtest.mk
index 91998fa..7a49062 100644
--- a/build/Android.gtest.mk
+++ b/build/Android.gtest.mk
@@ -188,6 +188,7 @@
   compiler/dex/local_value_numbering_test.cc \
   compiler/dex/mir_graph_test.cc \
   compiler/dex/mir_optimization_test.cc \
+  compiler/dwarf/dwarf_test.cc \
   compiler/driver/compiler_driver_test.cc \
   compiler/elf_writer_test.cc \
   compiler/image_test.cc \