entr 2.8
entr: add 2.8 bottle.

Closes #27727.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
appengine-java-sdk 1.9.1
go-appengine-sdk (386) 1.9.1
go-appengine-sdk (amd64) 1.9.1
google-appengine 1.9.1
google-app-engine: add 1.9.1 bottle.
go-app-engine-64: add 1.9.1 bottle.
go-app-engine-32: add 1.9.1 bottle.
app-engine-java-sdk: add 1.9.1 bottle.