ELF Tool Chain Code

* Change the code examples in libdwarf's manual page set to use the
`EXIT_FAILURE` symbol instead of a numeric return code.
* Style fixes: use `.Bd -offset indent`.

Ticket: #356

Turn on SVN keyword expansion.

Ticket: #348

Insert missing argument in the example code.

Revise the `dwarf_get_aranges.3` manual page:
* Add a section covering memory management.
* Remove the explanation of the use of a `Dwarf_Arange` descriptor; this
can move to the `dwarf.3` manual page.
* Simplify the code in the example; wrap long lines.

Reviewed by: kaiwang27
Ticket: #164

Fix typo.

Add manual page for dwarf_get_aranges.

Ticket: #164