tree f1557aea44abe67f83b74e332fc8d8c28192a3ff
parent 349baca032735e4a386b74709aa94d17f076cbce
author David Srbecky <dsrbecky@google.com> 1447092348 +0000
committer David Srbecky <dsrbecky@google.com> 1448037038 +0000

Encode function signatures properly in DWARF.

The signatures were previously stored as plain string.
The proper way in DWARF is to store them as structured tree of tags.
(for example, DW_TAG_subprogram containing DW_TAG_formal_parameter)

Note that this makes the debug sections smaller since DWARF
signatures are actually more efficient than just plain strings.

Change-Id: I6afbce28340570666d8674d07c0e324aad561dd5