[lldb] Fix a test assertion after r372192

Summary:
The `CHECK: frame:py: None` seems to have been a typo, causing build bot failures:

```
# CHECK: frame:py: None

         ^

<stdin>:1:1: note: scanning from here

(lldb) command source -s 0 'E:/build_slave/lldb-x64-windows-ninja/build/tools/lldb\lit\lit-lldb-init'

^

<stdin>:23:1: note: possible intended match here

frame:py: No value

^
```

This update fixes the build bots.

--

Reviewers: bkramer

Reviewed By: bkramer

Differential Revision: https://reviews.llvm.org/D67702

llvm-svn: 372221

Author: krasimirgg

lldb/lit/Commands/command-script-import.test

@@ -6,7 +6,7 @@
 # RUN: %lldb -b -s %t.in -o 'script print("script: {}").format(lldb.frame)' %t.out | FileCheck %s
 
 # Make sure that we don't have access to lldb.frame from the Python script.
-# CHECK: frame:py: None
+# CHECK: frame:py: No value
 
 # Make sure that we do have access to lldb.frame from the script command.
 # CHECK: script: frame #0