Revert "bio: remove reference count."

Android uses BIO reference counting.

This reverts commit 9bde6aeb76b1d2a45d76637553c3fb3f31e4ecbd.

Change-Id: Ibf4a7f42477549d10829a424ea3b52f09098666c
Reviewed-on: https://boringssl-review.googlesource.com/4472
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>
2 files changed