mingw: fix mingw_open_append to work with named pipes

diff --git a/t/t5400-send-pack.sh b/t/t5400-send-pack.sh
index d375d7110d102d6b3ea194e4f09a9b5f391ed496..911eae1bf7518485ace0fbd417e3ea0bbb18a9cf 100755 (executable)
--- a/t/t5400-send-pack.sh
+++ b/t/t5400-send-pack.sh
@@ -180,7 +180,7 @@ test_expect_success 'receive-pack runs auto-gc in remote repo' '
            # And create a file that follows the temporary object naming
            # convention for the auto-gc to remove
            : >.git/objects/tmp_test_object &&
-           test-chmtime =-1209601 .git/objects/tmp_test_object
+           test-tool chmtime =-1209601 .git/objects/tmp_test_object
        ) &&
        (
            cd parent &&