package/tremor: bump to revision 19427
The revision 18153 dates from 2012-01-20. Lets update to latest changed revision
19427 which dates from 2015-01-07.
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Jörg Krause