test-eval-release: handle ENV{VERBOSE}.

See test-eval-release.sh for details.

svn path=/nixpkgs/trunk/; revision=31824

maintainers/scripts/test-eval-release.sh

@@ -1,3 +1,6 @@
 #! /bin/sh
 
+if [[ -z "$VERBOSE" ]]; then
+  echo "You may set VERBOSE=1 to see debug output or to any other non-empty string to make this script completely silent"
+fi
 nix-instantiate --strict --eval-only --xml --show-trace "$(dirname "$0")"/eval-release.nix 2>&1 > /dev/null