add no-op logging to FakeEdenInstance

Summary: This is required for eden doctor cli tests when adding logging to the eden doctor code path. This can just be a stub since we don't consume these scuba log statements during testing

Reviewed By: fanzeyi

Differential Revision: D20087861

fbshipit-source-id: 6805ae8d9c51e33a118cbda76461483962e876f3

eden/cli/doctor/test/lib/fake_eden_instance.py

@@ -254,3 +254,11 @@ class FakeEdenInstance:
         fake_repo = FakeHgRepo()
         fake_repo.commit_checker = bad_commit_checker
         return fake_repo
+
+    def build_sample(
+        self, log_type: str, **kwargs: Union[bool, int, str, float]
+    ) -> None:
+        pass
+
+    def log(self, sample: None) -> int:
+        return 0