Log message:
Pullup ticket #4980 - requested by joerg
devel/elftoolchain: build fix

Revisions pulled up:
- devel/elftoolchain/Makefile                                   1.11

---
   Module Name:	pkgsrc
   Committed By:	joerg
   Date:		Sat May  7 09:52:44 UTC 2016

   Modified Files:
   	pkgsrc/devel/elftoolchain: Makefile

   Log message:
   Disable various noisy warnings for GCC too. Adjust clang handling to
   also work directly with bootstrap-mk-files.