python3-lxml: upgrade 5.2.1 -> 5.2.2

python3-lxml: upgrade 5.2.1 -> 5.2.2

Changelog:
===========
- The test_feed_parser test could fail if lxml_html_clean was not installed.
- The minimum CPU architecture for the Linux x86 binary wheels was set back to
  "core2", without SSE 4.2.
- If libxml2 uses iconv, the compile time version is available as etree.ICONV_COMPILED_VERSION.

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>