[PATCH V5] Fix issues with reading rnglists, especially from dwo files, for DWARF v5

[Simon Marchi]

On 2020-07-16 11:46 a.m., Caroline Tice wrote:
> We do in fact need the .debug_line section, because the test relies on
> setting a breakpoint at a particular line, and then seeing whether or
> not we can find the value of a variable in the lexical block there;
> without line table information I don't think GDB will be able to do
> that.

It's possible to set breakpoints some other way, like by label (I think).

But yeah, we can still have a v3/v4 .debug_line if needed.

Simon