Fix globbing error

configure.ac

@@ -854,6 +854,6 @@ esac
 
 # Ensure test directories are present if building out-of-tree
 AC_CONFIG_COMMANDS([mkdirs],
-		   [mkdir -p {libarchive,tar,cat,cpio}/test])
+		   [mkdir -p libarchive/test tar/test cat/test cpio/test])
 
 AC_OUTPUT