Add newlines to quic_client_interop_test output
Add newlines to quic_client_interop_test output

gfe-relnote: n/a (test tool only change)
PiperOrigin-RevId: 274901726
Change-Id: I4ce5db3415572f2fc8a1e9fb34de19adeac462a8

google/quiche,google/quiche,google/quiche,google/quiche