Use Linux 6.16, GCC 15, binutils 2.45 in build-many-glibcs.py

[Joseph Myers]

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

diff --git a/scripts/build-many-glibcs.py b/scripts/build-many-glibcs.py
index 36b1044c28..315693ef54 100755
--- a/scripts/build-many-glibcs.py
+++ b/scripts/build-many-glibcs.py
@@ -833,11 +833,11 @@ class Context(object):
 
     def checkout(self, versions):
         """Check out the desired component versions."""
-        default_versions = {'binutils': 'vcs-2.44',
-                            'gcc': 'vcs-14',
+        default_versions = {'binutils': 'vcs-2.45',
+                            'gcc': 'vcs-15',
                             'glibc': 'vcs-mainline',
                             'gmp': '6.3.0',
-                            'linux': '6.15',
+                            'linux': '6.16',
                             'mpc': '1.3.1',
                             'mpfr': '4.2.2',
                             'mig': 'vcs-mainline',

-- 
Joseph S. Myers
josmyers@redhat.com