[gcc r11-2984] testsuite: Add missing <exception> header to testcase

[Jonathan Wakely]

https://gcc.gnu.org/g:ce90d203cea33a4bfd4e415f601fe4486ecbb45d

commit r11-2984-gce90d203cea33a4bfd4e415f601fe4486ecbb45d
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Sep 2 18:37:17 2020 +0100

    testsuite: Add missing <exception> header to testcase
    
    This test no longer compiles because <new> stopped including
    <exception>, so std::set_terminate is not defined.
    
    gcc/testsuite/ChangeLog:
    
            * g++.old-deja/g++.abi/cxa_vec.C: Include <exception> for
            std::set_terminate.

Diff:
---
 gcc/testsuite/g++.old-deja/g++.abi/cxa_vec.C | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/testsuite/g++.old-deja/g++.abi/cxa_vec.C b/gcc/testsuite/g++.old-deja/g++.abi/cxa_vec.C
index d52637281fe..de647c4eb69 100644
--- a/gcc/testsuite/g++.old-deja/g++.abi/cxa_vec.C
+++ b/gcc/testsuite/g++.old-deja/g++.abi/cxa_vec.C
@@ -15,6 +15,7 @@
 #include <cxxabi.h>
 #include <stdio.h>
 #include <new>
+#include <exception>
 #include <stdlib.h>
 #include <setjmp.h>