package/motion: bump to version 4.3.1

- Drop patch (already in version)
- Call gettextsize and add a non upstreamable patch to remove
  po/Makefile.in: https://github.com/Motion-Project/motion/issues/1028
- --with-mysql-{include,lib} and --with-pgsql-{include,lib} have been
  dropped since version 4.3.0 and
  https://github.com/Motion-Project/motion/commit/0dc2ae9372cfd2705110ef25c8c85b246adb2dc6


- Update indentation in hash file (two spaces)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>