syncthing 0.9.9 (new formula)
syncthing: add 0.9.9 bottle.

Closes #30035.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
libmemcached: fix osx yosemite build

make cross-platform compatiblity
Update libmemcached.rb
libmemcached: update 1.0.18 bottle.
syncthing: update 0.9.9 bottle.