Fix #405, update rtems_sysmon banner

[avan989]

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  Fix Update rtems_sysmon banner  #405, update rtems_sysmon banner

Testing performed
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n/a

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None

System(s) tested on

• Hardware: [e.g. PC, SP0, MCP750]
• OS: [e.g. Ubuntu 18.04, RTEMS 4.11, VxWorks 6.9]
• Versions: [e.g. cFE 6.6, OSAL 4.2, PSP 1.3 for mcp750, any related apps or tools]

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  Anh Van, GSFC