Pullup ticket #6055 - requested by maya
security/gpgme: build fix

Revisions pulled up:
- security/gpgme/Makefile                                      1.95

---
  Module Name: pkgsrc
  Committed By: maya
  Date: Mon Sep  9 11:19:33 UTC 2019

  Modified Files:
  pkgsrc/security/gpgme: Makefile

  Log Message:
  gpgme: fix for older GCC.

  Remove unrecognized flag (GCC 4.8.5), default to -std=gnu99, since we have
  loop initial declarations.

  tested on SmartOS and CentOS 7.

(bsiegert)