Update includes:
- Changing syntax of `OI/`NI` tags from `<!NI;TAG!>` to `<!TAG{NI}!>`
- Fix some incorrect directives
- Change order of diagnostics in some places
- Remove ignored diagnostics from FIR test data (previously `DIAGNOSTICS` didn't work)
- Update FIR dumps in some places and add `FIR_IDENTICAL` if needed
- Replace all JAVAC_SKIP with SKIP_JAVAC directive
- It's worked almost fine but diagnostics were filtered out by
positioning strategy.
- Also a couple of "put" calls to Multimap are replaced by "putValues"
within OverloadResolver, that is more semantically correct.
- Note that constructors of top-level classes are handled when processing
package, it helps to figure out if there are clashes with top-level
functions that have the same name.
- But constructors of different classes are not reported as
overloads because containing classes has the same name and will be
reported as redeclaration.
Nikolay Lunyak