sphinx: libstemmer has moved to github

Refs #27875.

Closes #34681.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
sphinx: update 2.2.5 bottle.
lz4 version r124
rocksdb: bump revision for lz4 update to r124
groonga: bump revision for lz4 update to r124
groonga: update 4.0.7_1 bottle.
lz4: update r124 bottle.
rocksdb: update 3.6.1_1 bottle.