Update setupext.py

fix wrong error msg

Co-authored-by: Oscar Gustafsson <[email protected]>

Author: wqh17101

setupext.py

@@ -630,7 +630,7 @@ def do_custom_build(self, env):
             configure_ac = os.path.join(src_path, "builds", "unix", "configure.ac")
             if os.path.exists(os.path.join(src_path, "autogen.sh")) \
                     and not os.path.exists(configure_ac):
-                print(f"{configure_ac} not exist. Using sh autogen.sh to generate.")
+                print(f"{configure_ac} does not exist. Using sh autogen.sh to generate.")
                 subprocess.check_call(["sh", "./autogen.sh"], env=env, cwd=src_path)
             env["CFLAGS"] = env.get("CFLAGS", "") + " -fPIC"
             configure = [