[Bug middle-end/68079] hppa: pointers to method types need canonicalization before comparison

[danglin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68079

--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 36574
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36574&action=edit
Patch for trunk