Use Linux 5.7 in build-many-glibcs.py [committed]

[Joseph Myers]

This patch makes build-many-glibcs.py use Linux 5.7.

Tested with build-many-glibcs.py (host-libraries, compilers and glibcs
builds).

---

Committed.

diff --git a/scripts/build-many-glibcs.py b/scripts/build-many-glibcs.py
index 6c6615b200..8c72b9e571 100755
--- a/scripts/build-many-glibcs.py
+++ b/scripts/build-many-glibcs.py
@@ -750,7 +750,7 @@ class Context(object):
                             'gcc': 'vcs-10',
                             'glibc': 'vcs-mainline',
                             'gmp': '6.2.0',
-                            'linux': '5.6',
+                            'linux': '5.7',
                             'mpc': '1.1.0',
                             'mpfr': '4.0.2',
                             'mig': 'vcs-mainline',

-- 
Joseph S. Myers
joseph@codesourcery.com