libsoup: upgrade to 2.42.1

libsoup: upgrade to 2.42.1

Upgrade to the latest stable release, and fix the dependencies.

gnome-keyring use has been removed from libsoup, and sqlite3 is now a hard
dependency.  The optional libsoup-gnome library is now a small stub, so enable
it by default but allow it to be disabled via PACKAGECONFIG.

(From OE-Core rev: 3f093e24e78cc8a553bebc03ec9f3a32700981e6)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>