selftests/vsock: add BUILD=0 definition

Add the definition for BUILD and initialize it to zero. This avoids
'bash -u vmtest.sh` from throwing 'unbound variable' when BUILD is not
set to 1 and is later checked for its value.

Signed-off-by: Bobby Eshleman <bobbyeshleman@meta.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://patch.msgid.link/20251108-vsock-selftests-fixes-and-improvements-v4-9-d5e8d6c87289@meta.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/vsock/vmtest.sh b/tools/testing/selftests/vsock/vmtest.sh
index a1c2969c44b6c99e6b1fca5bb1cb0530512d8305..e961b65b4c6e8ab636909ef6081f80ecbe383140 100755 (executable)
--- a/tools/testing/selftests/vsock/vmtest.sh
+++ b/tools/testing/selftests/vsock/vmtest.sh
@@ -548,6 +548,7 @@ run_shared_vm_test() {
        return "${rc}"
 }
 
+BUILD=0
 QEMU="qemu-system-$(uname -m)"
 
 while getopts :hvsq:b o