[gcc r14-11996] libstdc++: Add missing <vector> header to unordered_set/pr115285.cc test

[Jonathan Wakely]

https://gcc.gnu.org/g:789c64455cb1e35c70f0736e018ad776add12e73

commit r14-11996-g789c64455cb1e35c70f0736e018ad776add12e73
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Nov 1 16:09:02 2024 +0000

    libstdc++: Add missing <vector> header to unordered_set/pr115285.cc test
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/23_containers/unordered_set/pr115285.cc: Include
            missing header for std::vector.
    
    (cherry picked from commit a51d220377ab8117305567e888a942d127ef6a48)

Diff:
---
 libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc b/libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc
index 6c5cc24930ce..85954aed74b5 100644
--- a/libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc
+++ b/libstdc++-v3/testsuite/23_containers/unordered_set/pr115285.cc
@@ -2,8 +2,9 @@
 
 // libstdc++/115285
 
-#include <string>
 #include <unordered_set>
+#include <string>
+#include <vector>
 
 #include <testsuite_hooks.h>