Files generated by SCons should depend on the build_profile (if given)

[dsnopek]

On godot_openxr_vendors, we've been having this problem with the SCons cache on CI, where if a PR adds something to the build_profile.json it'll still use outdated generated files from the cache.

This change attempts to make it so that it'll rebuild the generated files if the build_profile.json changes

I'm still not entirely sure this fixes the issue, because it's hard to test in the context of CI, but I'll see what I can do!

And I'd also appreciate feedback from folks who are more experienced with build system stuff

UPDATE: I've managed to do some testing (see this comment), and it seems to be working

[dsnopek]

This does seem to fix the issue with godot_openxr_vendor's CI.

We were having the issue on master, and I was experiencing it on a PR as well. So, I first tried using these changes on the PR: it fixed it. So, I merged just those changes into master as well: fixed it there too!

We'll keep testing it there for a bit and see if the issue manages to recur :-)