lua: fix setup-hook *.lua matching

the setup-hook checks if a derivation contains lua files matching
lua_path patterns. We use bash's globstar extension for that but
`**.lua` doesn't return files in subfolders, it has to be `**/*.lua`.
Adjust the pattern accordingly.

pkgs/development/interpreters/lua-5/hooks/setup-hook.sh

@@ -25,8 +25,8 @@ addToLuaSearchPathWithCustomDelimiter() {
   # export only if the folder contains lua files
   shopt -s globstar
 
-
-  for _file in ${absPattern/\?/\*\*}; do
+  local adjustedPattern="${absPattern/\?/\*\*\/\*}"
+  for _file in $adjustedPattern; do
     export "${varName}=${!varName:+${!varName};}${absPattern}"
     shopt -u globstar
     return;