Fix discarding records in bidirectional shutdown.

When discarding a record, it's important to start reading the next one,
or the state machine retry signaling doesn't work.

BUG=526437

Change-Id: I5e4a5155310d097c0033cdf5d06712410a01ee08
Reviewed-on: https://boringssl-review.googlesource.com/5768
Reviewed-by: Adam Langley <agl@google.com>
1 file changed