Convert more DWARF code to new hash table

This converts more code in the DWARF reader to use the new hash table.

Change-Id: I86f8c0072f0a09642de3d6f033fefd0c8acbc4a3
Co-Authored-By: Tom Tromey <tom@tromey.com>
Approved-By: Tom Tromey <tom@tromey.com>
3 files changed