transmission: rebuild against the versioned libdht

transmission: rebuild against the versioned libdht

libdht now installs libdht.so.0 with a soname and an ABI_VERSION, so the
package it depends on is libdht0 rather than libdht. Bump PKG_RELEASE to
force the rebuild that picks that up.

No other change is needed: DHT_LIBRARY still points at the libdht.so
development symlink, and the resulting binary records the soname, so
transmission-daemon links libdht.so.0 and depends on libdht0.

Signed-off-by: Daniel Golle <redacted>