Import l64a from http://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/lib/libc/stdlib/l64a.c
Update Makefile, and stlib.h to export l64a APIs
Import calloc from http://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/lib/libc/stdlib/calloc.c
Finish porting calloc from DragonFlyBSD
Move DragonFlyBSD originated source, put this in an stdlib dir, later
Update Makefile to account for move
Import bsearch from http://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEAD:/lib/libc/stdlib/bsearch.c
Hacky cdefs for __DECONST)
Hacky (u)intptr_t. Is this correct? But bsearch builds, now...