package/wpewebkit: security bump to version 2.22.5

package/wpewebkit: security bump to version 2.22.5

Fixes the following security issues:

- CVE-2019-8518: Processing maliciously crafted web content may lead to
  arbitrary code execution.  Multiple memory corruption issues were
  addressed with improved memory handling.

- CVE-2019-8523: Processing maliciously crafted web content may lead to
  arbitrary code execution.  Multiple memory corruption issues were
  addressed with improved memory handling.

In addition, 2.22.5 contains a number of bugfixes.  From the announcement:

  - Fix rendering of glyphs in Hebrew (and possibly other languages) when
    Unicode NFC normalization is used.
  - Fix several crashes and race conditions.

Change SITE to https as the webserver uses HSTS.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>