Log Message:
Pullup ticket #6320 - requested by he
devel/protobuf: PowerPC build fix

Revisions pulled up:
- devel/protobuf/hacks.mk                                       1.1

---
   Module Name:	pkgsrc
   Committed By:	he
   Date:		Tue Sep  8 08:35:23 UTC 2020

   Added Files:
   	pkgsrc/devel/protobuf: hacks.mk

   Log Message:
   On powerpc, which lacks native 8-byte atomics, use devel/libatomic.
   Build fix on this platform only, so no revision bump.