Declare global array

Author: tianon

generate-stackbrew-library.sh

@@ -41,7 +41,7 @@ getArches() {
 	local repo="$1"; shift
 	local officialImagesUrl='https://github.com/docker-library/official-images/raw/master/library/'
 
-	eval "declare -A -g parentRepoToArches=( $(
+	eval "declare -g -A parentRepoToArches=( $(
 		find -name 'Dockerfile' -exec awk '
 				toupper($1) == "FROM" && $2 !~ /^('"$repo"'|scratch|microsoft\/[^:]+)(:|$)/ {
 					print "'"$officialImagesUrl"'" $2