Pullup ticket #5888 - requested by maya
lang/ghc7: build fix

Revisions pulled up:
- lang/ghc7/Makefile                                            1.32

---
  Module Name: pkgsrc
  Committed By: maya
  Date: Thu Jan 10 18:11:56 UTC 2019

  Modified Files:
  pkgsrc/lang/ghc7: Makefile

  Log Message:
  ghc7: not aslr safe, either. bump PKGREVISION

  Fix PR pkg/53842. ghci dies with:
  ghc: mmap 593920 bytes at 0x40000000: Cannot allocate memory

(bsiegert)