Fix missing linebreak at the end of realtime log messages
In the log files written by the ArmarXCore FileLogger, the linebreak is missing after messages from the realtime code.
The error macros used by the armarx_integration/devices/ethercat/ code are defined in armarx/skills/control/source/armarx/control/ethercat/ErrorReporting.h, which uses the Error (a.k.a. error::Entry) class. Thus, this fix is, other than expected, not in armarx_integration/devices, but in armarx/skills/control.