Log message:
Pullup ticket #4896 - requested by taca
devel/ruby-debugger: build fix
devel/ruby-debugger-linecache: build fix

Revisions pulled up:
- devel/ruby-debugger-linecache/Makefile                        1.3
- devel/ruby-debugger/Makefile                                  1.7

---
   Module Name:    pkgsrc
   Committed By:   taca
   Date:           Sun Dec 27 12:06:16 UTC 2015

   Modified Files:
           pkgsrc/devel/ruby-debugger: Makefile
           pkgsrc/devel/ruby-debugger-linecache: Makefile

   Log message:
   Drop ruby21 support.