some build improvements
* prevent to overwrite our CC/CFLAGS settings in Makefile.
* more libtoolize
Import String-Print-0.13 as devel/p5-String-Print.

This module inserts values into (translated) strings. It provides
printf and sprintf alternatives via both an object oriented and a
functional interface.
Add p5-String-Print
Added devel/p5-String-Print version 0.13