TBR: swift/discovery: add build tag

Change-Id: I2d8c36875b932d84bc048f2af3223564c268a12d
2 files changed
tree: de158a8877c97125809184009a9948a1b776fb06
  1. impl/
  2. main/
  3. util/
  4. v23/
  5. .gitignore
  6. swift.go
  7. types.h