Fix mode on scripts to have the read bit set (noted by Nicholas Riley)

command/install_scripts.py

@@ -53,7 +53,7 @@ class install_scripts (Command):
                 if self.dry_run:
                     log.info("changing mode of %s", file)
                 else:
-                    mode = ((os.stat(file)[ST_MODE]) | 0111) & 07777
+                    mode = ((os.stat(file)[ST_MODE]) | 0555) & 07777
                     log.info("changing mode of %s to %o", file, mode)
                     os.chmod(file, mode)