[llvm] [llvm-dwp] Fix infinite loop on DWARFv5 DW_FORM_implicit_const (PR #205567)

[David Blaikie via llvm-commits]

dwblaikie wrote:

> > What about DW_FORM_indirect?
> 
> from looking in other code handling DW_FORM_indirect, I do not believe it needs the same fix as implicit_const.

Ah, yeah, my mistake. I guess it probably doesn't produce a problem when parsing the abbrev - it's still <attribute kind>,<form kind>.

https://github.com/llvm/llvm-project/pull/205567