adding buck file for triton-lang/kernels
Summary: triton.op has been deprecated and the only place those kernels are available is in the kernels repo. Adding the buck file for the repo here
Reviewed By: xuzhao9
Differential Revision: D62253869
fbshipit-source-id: 3fa8de282e6d295d0c24895bd3dcf8addc0b8d55
