[lldb] Add missing import for LLDB test decorators to TestStopHookScripted

This test wasn't using decorators before and was missing the import, so my
previous commit broke the test.

Author: Teemperor

lldb/test/API/commands/target/stop-hooks/TestStopHookScripted.py

@@ -7,7 +7,7 @@
 import lldb
 import lldbsuite.test.lldbutil as lldbutil
 from lldbsuite.test.lldbtest import *
-
+from lldbsuite.test.decorators import *
 
 class TestStopHooks(TestBase):