core library/provided funcs for wizard

[ejrgilbert]

Working toward the following in this PR:

• automatically import core library, if used in script
  - report variables should work (the global ones)
  - maps should work
• automatically inject provided functions, if used in script
  - strcmp should work

Future:

• get report vars in a probe's body working (requires the alloc function)
• predicate on the target function name