Fix #2580, address sanitizer issue in coverage-evs-ALL

[avan989]

Fix #2580, add in fake message to SBptr.

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• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution
A clear and concise description of what the contribution is.
Fix #2580, add in fake message for software bus pointer.

Testing performed
Steps taken to test the contribution:
Add in the the following options:
add_compile_options(
-fsanitize=address
-fsanitize=undefined
-fsanitize-recover=all
-g
)
add_link_options(
-fsanitize=address
-fsanitize=undefined
-fsanitize-recover=all
)

1. make SIMULATION=native ENABLE_UNIT_TESTS=true prep
2. make install
3. Run test

Expected behavior changes
A clear and concise description of how this contribution will change behavior and level of impact.

• API Change: xxx (if applicable)
• Behavior Change: xxx (if applicable)
• Or no impact to behavior

no impact to behavior

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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• Note CLAs apply to only software contributions.
  Anh Van, GSFC