Misc syntax adjustments suggested by Adriano.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@57757 65644016-39b1-43b1-bf79-96bc8fe82c15
Make tracing VIO works and more easy to use:
- log into file instead of console
- rebuild only small set of affected modules when VIO_DEBUG is changed


git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@57759 65644016-39b1-43b1-bf79-96bc8fe82c15