Add body control option wildcard_inputs that accepts input wildcards against $(sys.workdir)/inputs only.

Usage example:

```
body common control
{
      bundlesequence => { run};
      inputs => {};
      wildcard_inputs => { "api*.cf", "/x*.cf" };
}

bundle agent run
{
  reports:
      "Hi!";
}
```

Issues:

* requires `inputs` to be given as well, see `InputFiles` function
* requires `<glob.h>` which is standard but may be missing on older systems, so an autoconf rule for it would be really nice