appengine-java-sdk 1.7.6

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
go-appengine (386) 1.7.6

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
go-appengine (amd64) 1.7.6

Closes #18737.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>