autoPatchelfHook: Fix type of norecurse variable

While declaring it as an array doesn't do any harm in our usage, it
might be a bit confusing when reading the code.

Signed-off-by: aszlig <aszlig@nix.build>

pkgs/build-support/setup-hooks/auto-patchelf.sh

@@ -173,7 +173,7 @@ addAutoPatchelfSearchPath() {
 }
 
 autoPatchelf() {
-    local -a norecurse=
+    local norecurse=
 
     while [ $# -gt 0 ]; do
         case "$1" in