Pullup ticket #5993 - requested by he
lang/clisp: build fix

Revisions pulled up:
- lang/clisp/Makefile                                          1.112

---
  Module Name: pkgsrc
  Committed By: he
  Date: Tue Jul  9 22:55:41 UTC 2019

  Modified Files:
  pkgsrc/lang/clisp: Makefile

  Log Message:
  Patterned after electric-fence, turn off builtins for calloc, malloc,
  memalign, realloc, valloc and free.  Makes clisp work with modern compilers.
  Bump PKGREVISION.

(bsiegert)