Pullup ticket #6557 - requested by he
graphics/graphviz: PowerPC build fix

Revisions pulled up:
- graphics/graphviz/Makefile                                    1.242

---
  Module Name: pkgsrc
  Committed By: he
  Date: Wed Dec 29 12:10:32 UTC 2021

  Modified Files:
  pkgsrc/graphics/graphviz: Makefile

  Log Message:
  Build with -fopenmp on NetBSD/powerpc, so that we link explicitly
  with -lgomp and thereby avoid overflowing the static thread local
  storage allocated in ld.elf_so when libgomp.so is dlopen()ed
  indirectly via libgvplugin_gd.so.

  Bump PKGREVISION.

(bsiegert)