build-aux: Revert to :global-test-result: in test-driver.scm.

This follows clarification with upstream on the valid name to use:
<https://lists.gnu.org/archive/html/automake/2026-03/msg00005.html>.  The
change was made in the recent commit ef4ba3191f01.

* build-aux/test-driver.scm (test-runner-gnu): Revert global test result key
to ':global-test-result:'.

Change-Id: If0eca05b8b57f1fd5d848e82bc789c43640d3caf

1 files changed, 2 insertions, 2 deletions

diff --git a/build-aux/test-driver.scm b/build-aux/test-driver.scm
index b74f8a23c71..7d3d82ae23e 100755
--- a/build-aux/test-driver.scm
+++ b/build-aux/test-driver.scm
@@ -3,7 +3,7 @@ exec guile --no-auto-compile -e main -s "$0" "$@"
 !#
 ;;;; test-driver.scm - Guile test driver for Automake testsuite harness
 
-(define script-version "2026-03-20.08") ;UTC
+(define script-version "2026-03-21.02") ;UTC
 
 ;;; Copyright © 2015, 2016 Mathieu Lirzin <mthl@gnu.org>
 ;;; Copyright © 2021 Maxim Cournoyer <maxim@guixotic.coop>
@@ -197,7 +197,7 @@ called to do the final reporting."
                     (positive? (test-runner-xpass-count runner))))
           (skip (or (positive? (test-runner-skip-count runner))
                     (positive? (test-runner-xfail-count runner)))))
-      (format trs-port ":test-global-result: ~{~A~^,~}~%"
+      (format trs-port ":global-test-result: ~{~A~^,~}~%"
               (filter-map (λ (proc str)
                             (let ((n (proc runner)))
                               (if (positive? n) str #f)))