test: no execve error msg synced to parent process

Signed-off-by: lifubang <lifubang@acmcoder.com>

tests/integration/exec.bats

@@ -338,5 +338,5 @@ EOF
 	# Although we never close the sync socket when doing exec,
 	# but we need to keep this test to ensure this behavior is always right.
 	[ ${#lines[@]} -eq 1 ]
-	[[ ${lines[0]} = *"exec failed: unable to start container process: exec /run.sh: no such file or directory"* ]]
+	[[ ${lines[0]} = *"exec /run.sh: no such file or directory"* ]]
 }