Revert "Fix libarchive permission extraction"

This was a bad way to fix a problem upstream. Doing this resulted in
symlink permissions being applied to files installed on the system, leaving
some binaries with 77 permission, etc.

This reverts commit 4e6b7c1cde.

lib/libalpm/add.c

@@ -696,8 +696,6 @@ int _alpm_add_commit(pmtrans_t *trans, pmdb_t *db)
 						_alpm_log(PM_LOG_ERROR, _("could not extract %s (%s)"), filename, strerror(errno));
 						alpm_logaction(_("error: could not extract %s (%s)"), filename, strerror(errno));
 						errors++;
-					} else {
-						chmod(filename, archive_entry_mode(entry));
 					}
 
 					/* calculate an hash if this is in newpkg's backup */