glibc: stable 2.39 branch updates

glibc: stable 2.39 branch updates

$ git log --oneline 3463100f2d47f2897a24ba8023a5c7aaf2d26550..06a70769fd0b2e1f2a3085ad50ab620282bd77b3
06a70769fd ppc64le: Revert "powerpc: Optimized strcmp for power10" (CVE-2025-5702)
3875045da5 ppc64le: Revert "powerpc : Add optimized memchr for POWER10" (Bug 33059)
c6240a11f7 ppc64le: Revert "powerpc: Fix performance issues of strcmp power10" (CVE-2025-5702)
2caef2827f elf: Fix subprocess status handling for tst-dlopen-sgid (bug 32987)
9e25c0f445 x86_64: Fix typo in ifunc-impl-list.c.
ca99d55315 elf: Test case for bug 32976 (CVE-2025-4802)
71ddb11ccd support: Add support_record_failure_barrier
abdeb4b520 support: Use const char * argument in support_capture_subprogram_self_sgid
147bed0a71 elf: Keep using minimal malloc after early DTV resize (bug 32412)
4e5ee49a43 sysdeps/unix/sysv/linux/x86_64/Makefile: Add the end marker
37b30b6a68 sysdeps/x86_64/Makefile (tests): Add the end marker
9fe51d34bb sort-makefile-lines.py: Allow '_' in name and "^# name"
14ec225d85 libio: Correctly link tst-popen-fork against libpthread
1dcfb9479d libio: Fix a deadlock after fork in popen
e31ac9a639 libio: Sort test variables in Makefile
68f3f1a1d0 Linux: Switch back to assembly syscall wrapper for prctl (bug 29770)
d33d10642f nptl: PTHREAD_COND_INITIALIZER compatibility with pre-2.41 versions (bug 32786)
b1eb369aee nptl: Use all of g1_start and g_signals
ac5da3c0e4 nptl: rename __condvar_quiesce_and_switch_g1
2fdc0afd07 nptl: Fix indentation
582c99b2c0 nptl: Use a single loop in pthread_cond_wait instaed of a nested loop
fc2a25417d nptl: Remove g_refs from condition variables
6f5ba03968 nptl: Remove unnecessary quadruple check in pthread_cond_wait
d0da34ad30 nptl: Remove unnecessary catch-all-wake in condvar group switch
ea13a35e37 nptl: Update comments and indentation for new condvar implementation
2451ef5c4a pthreads NPTL: lost wakeup fix 2

test results:
            Before After  Diff
FAIL           207   207     0
PASS          4912  4915    +3
UNSUPPORTED    230   230     0
XFAIL           16    16     0
XPASS            4     4     0

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>