maintainers/create-azure.sh: run from anywhere

I'm not really sure how the line directly after ended up with this,
but this line didn't...

+2 -2
+2 -2
nixos/maintainers/scripts/azure/create-azure.sh
··· 1 - #! /bin/sh -e 1 + #! /bin/sh -eu 2 2 3 - export NIX_PATH=nixpkgs=../../../.. 3 + export NIX_PATH=nixpkgs=$(dirname $(readlink -f $0))/../../../.. 4 4 export NIXOS_CONFIG=$(dirname $(readlink -f $0))/../../../modules/virtualisation/azure-image.nix 5 5 export TIMESTAMP=$(date +%Y%m%d%H%M) 6 6