fetch: remove secpass import (bug 601252)

Refer to the portage.secpass.data attribute directly rather than via
import value, since the value will change after fork and os.setuid
calls when the fetch function is called with dropped privileges as
discussed in bug 601252.

Bug: https://bugs.gentoo.org/601252
Signed-off-by: Zac Medico <zmedico@gentoo.org>

lib/portage/package/ebuild/fetch.py

@@ -1,4 +1,4 @@
-# Copyright 2010-2019 Gentoo Authors
+# Copyright 2010-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 from __future__ import print_function
@@ -46,7 +46,7 @@
 	checksum_str)
 from portage.const import BASH_BINARY, CUSTOM_MIRRORS_FILE, \
 	GLOBAL_CONFIG_PATH
-from portage.data import portage_gid, portage_uid, secpass, userpriv_groups
+from portage.data import portage_gid, portage_uid, userpriv_groups
 from portage.exception import FileNotFound, OperationNotPermitted, \
 	PortageException, TryAgain
 from portage.localization import _
@@ -882,7 +882,7 @@ def fetch(myuris, mysettings, listonly=0, fetchonly=0,
 
 					if not has_space_superuser:
 						has_space = False
-					elif secpass < 2:
+					elif portage.data.secpass < 2:
 						has_space = False
 					elif userfetch:
 						has_space = False