[glibc] elf: Fix elf/tst-bz26577-minstack.c on hurd

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=785a028ab70da332bf0d573c7fc3d7bb0c4f7273

commit 785a028ab70da332bf0d573c7fc3d7bb0c4f7273
Author: Adhemerval Zanella <[email protected]>
Date:   Thu May 14 17:20:02 2026 -0300

    elf: Fix elf/tst-bz26577-minstack.c on hurd
    
    Hurd does not defined PTHREAD_STACK_MIN, use support_small_thread_stack_size
    instead.
    
    Checked on a x86_64-gnu build.

Diff:
---
 elf/tst-bz26577-minstack.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/elf/tst-bz26577-minstack.c b/elf/tst-bz26577-minstack.c
index 6b8fa5e9bf..f49011290f 100644
--- a/elf/tst-bz26577-minstack.c
+++ b/elf/tst-bz26577-minstack.c
@@ -51,10 +51,16 @@ static int
 do_test (void)
 {
   char *path = xasprintf ("%s/elf/tst-bz26577-mod.so", support_objdir_root);
+  size_t stacksize =
+#ifdef PTHREAD_STACK_MIN
+    PTHREAD_STACK_MIN
+#else
+    support_small_thread_stack_size ();
+#endif
 
   pthread_attr_t attr;
   xpthread_attr_init (&attr);
-  xpthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
+  xpthread_attr_setstacksize (&attr, stacksize);
   pthread_t thr = xpthread_create (&attr, dlopen_thread, path);
   xpthread_join (thr);
   xpthread_attr_destroy (&attr);