Log message:
Pullup ticket #4781 - requested by bsiegert
net/gcloud-golang-metadata: build fix

Revisions pulled up:
- net/gcloud-golang-metadata/Makefile                           1.2

---
   Module Name:    pkgsrc
   Committed By:   bsiegert
   Date:           Sat Jul 25 14:23:58 UTC 2015

   Modified Files:
           pkgsrc/net/gcloud-golang-metadata: Makefile

   Log message:
   Fix build on NetBSD, PR pkg/49909.

   It turns out that [^a]* matches all files not beginning with a on Darwin
   and all files beginning with a on NetBSD. Work around this by crafting
   a for loop with a case expression.