Fix #79, generate stubs for internal functions

[jphickey]

Checklist (Please check before submitting)

• 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
Regenerate the stubs for fm_child, fm_cmds, and fm_tbl internal units using the UT assert stub generator tool.

Fixes #79

Testing performed
Build and run all tests

Expected behavior changes
None (but see notes)

System(s) tested on
Debian

Additional context
Other APIs have been changed in parallel PRs so those stubs are NOT updated here. Those stubs will be updated with their respective PRs (avoids merge conflict).

This also requires the changes from nasa/osal#1352 in order to deal with the differently-sized return values.

Contributor Info - All information REQUIRED for consideration of pull request
Joseph Hickey, Vantage Systems, Inc.

[jphickey]

Re-pushed identical commit to re-run all tests.

[jphickey]

@dzbaker - as discussed in last week's CCB, this should be OK now that the OSAL update is in place. I re-ran tests and it is passing now.

[jphickey]

Latest update removed fm_cmd_stubs.c from this set, because it needs to be with PR #81 (this just avoids a conflict)