addr2line: Support -i, --inlines output option.

addr2line: Support -i, --inlines output option.

Show all source locations that caused inline expansion of subroutines
at the given address. This can easily be supported by using libdw
dwarf_getscopes_die which will give all nested inlined subroutines.
When -f, --functions is given also show the function names where the
subroutines were inlined.

The output matches that of binutils addr2line --inlines.

Signed-off-by: Mark Wielaard <mjw@redhat.com>