Add __libdw_getdieranges

Add __libdw_getdieranges

__libdw_getdieranges builds an aranges list by iterating over each
CU and recording each address range.

This function is an alternative to dwarf_getaranges.  dwarf_getaranges
attempts to read address ranges from .debug_aranges, which might be
absent or incomplete.

This patch replaces dwarf_getaranges with __libdw_getdieranges in
dwarf_addrdie and dwfl_module_addrdie.  The existing tests in
run-getsrc-die.sh are also rerun with .debug_aranges removed from
the testfiles.

https://sourceware.org/bugzilla/show_bug.cgi?id=22288
https://sourceware.org/bugzilla/show_bug.cgi?id=30948

Signed-off-by: Aaron Merey <amerey@redhat.com>