libct/logs.ForwardLogs: use bufio.Scanner
libct/logs.ForwardLogs: use bufio.Scanner

Error handling is slightly cleaner this way.

While at it, do minor refactoring and fix error logging
in processEntry.

Signed-off-by: Kir Kolyshkin <3a017b8ddb3f9cf3e4a59978b004111bdeb97f08@gmail.com>

kolyshkin/runc,dqminh/runc,rhatdan/runc,rhatdan/runc,rhatdan/runc,kolyshkin/runc,opencontainers/runc,dqminh/runc,kolyshkin/runc,opencontainers/runc,rhatdan/runc,opencontainers/runc,kolyshkin/runc,dqminh/runc,opencontainers/runc,dqminh/runc