GraphBLAS: Generate GB_JITpackage.c only if included files have changed.

[mmuetzel]

This avoids relinking libgraphblas if nothing actually changed.
And in turn that avoids re-linking everything when calling make demos for LAGraph.

This might help to avoid the linker being stuck sometimes when relinking the LAGraph binaries on macOS (for an unknown reason).

[mmuetzel]

The macos runner failed with the following error while installing the dependencies from homebrew:

==> sbt
You can use $SBT_OPTS to pass additional JVM options to sbt.
Project specific options should be placed in .sbtopts in the root of your project.
Global settings should be placed in /usr/local/etc/sbtopts

The installation does not include `sbtn`.
Error: Process completed with exit code 1.

I don't know what that means.

[mmuetzel]

The actual error might be this:

==> Pouring [email protected]
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink bin/2to3-3.12
Target /usr/local/bin/2to3-3.12
already exists. You may want to remove it:
  rm '/usr/local/bin/2to3-3.12'

To force the link and overwrite all conflicting files:
  brew link --overwrite [email protected]

To list all files that would be deleted:
  brew link --overwrite --dry-run [email protected]

Possible conflicting files are:
/usr/local/bin/2to3-3.12 -> /Library/Frameworks/Python.framework/Versions/3.12/bin/2to3-3.12
/usr/local/bin/idle3.12 -> /Library/Frameworks/Python.framework/Versions/3.12/bin/idle3.12
/usr/local/bin/pydoc3.12 -> /Library/Frameworks/Python.framework/Versions/3.12/bin/pydoc3.12
/usr/local/bin/python3.12 -> /Library/Frameworks/Python.framework/Versions/3.12/bin/python3.12
/usr/local/bin/python3.12-config -> /Library/Frameworks/Python.framework/Versions/3.12/bin/python3.12-config

Edit: Should be fixed by forcing the installation of Python 3.12

[DrTimothyAldenDavis]

Yes, this would be better. I just couldn't figure out how to get it to work.