libsoup: bump to 2.32.2

Buildroot should use a stable release, not use an unstable development
version. Updating to the current stable branch (2.34) is not trivial,
so at least use the latest release from the stable 2.32 branch.

Signed-off-by: Sven Neumann <s.neumann@raumfeld.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>