sqlite: Corrected formatting of Python scripts.

Corrected indent to be four spaces IAW the style guide. Doing this
makes all Python scripts uniformaly formatted in //third_party/sqlite/scripts.

Bug: None
Change-Id: I476654c330bf957e0ad65d46c44df53e1eacdf2d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2150236Reviewed-by: Darwin Huang <huangdarwin@chromium.org>
Commit-Queue: Chris Mumford <cmumford@google.com>
Cr-Commit-Position: refs/heads/master@{#759702}

third_party/sqlite/scripts/.yapfignore

-# TODO(cmumford): Format older files in a future CL.
-extract_sqlite_api.py
-extract_sqlite_api_unittest.py