Fix #828, Spacecraft ID sample set to historical value (0x42)

[skliper]

Describe the contribution
Fix #828 - set spacecraft ID in sample targets.cmake to 0x42

Testing performed
Nominal build and test

Expected behavior changes
Spacecraft ID back to historical value (some toolchains depend on it). Verified at PSP startup, reported as 66 (0x42).

System(s) tested on

• Hardware: cFS Dev Server
• OS: Ubuntu 18.04
• Versions: bundle main (w/ cfe/osal main) + this commit

Additional context
None

Third party code
None

Contributor Info - All information REQUIRED for consideration of pull request
Jacob Hageman - NASA/GSFC

[skliper]

May want to consider this one for inclusion in Bootes... since the previous change (where it went to 42 decimal) could be considered a "breaking" change. There are toolchains that depend on this historical value. Although it is just in the sample config settings, so easy enough to fix. Just won't work "out of the box" for folks with an expectation that it didn't change.

[CDKnightNASA]

I say hotfix Bootes with this.

[astrogeco]

CCB 2020-08-26 - APPROVED, add to Bootes and tag rc2

[astrogeco]

Instructions for this merge:

1. Create new branch based on 6.8.x
2. Merge this PR into that branch
3. Create PRs to merge that branch into main
4. Create PR to merge that branch into 6.8.x

[skliper]

I can rebase this on 6.8.x if you want.

[skliper]

This one is good to go onto 6.8.x, I'll create the PR for 7.0 next.