artiq_flash: make scripts_path a function (for doc generating)

artiq/frontend/artiq_flash.py

@@ -11,6 +11,7 @@ from artiq import __artiq_dir__ as artiq_dir
 from artiq.frontend.bit2bin import bit2bin
 
 
+def scripts_path():
     scripts_path = ["share", "openocd", "scripts"]
     if os.name == "nt":
         scripts_path.insert(0, "Library")
@@ -139,7 +140,7 @@ def main():
             target_file = opts.target_file
         subprocess.check_call([
             "openocd",
-            "-s", scripts_path,
+            "-s", scripts_path(),
             "-f", target_file,
             "-c", "; ".join(prog),
         ])