Use "long" format to parse messages

Currently messages with ": " in tag (e.g. "Y: Foobar") are parsed incorrectly - tag drops after the first colon. Long format doesn't suffer from this problem because meta (tags, time, pids) and message are in the separate lines.

I was considering using the binary format (logcat -B). It has a nice property of having full timestamps too. However it seems to change between platform versions.