JACOBIN-498 Incremental PR

[texadactyl]

First commit:

• trace/trace.go (new)
• trace/trace_test.go (new)
• globals/globals.go <--- only the Trace flags; still need to do the CLI options in concert with jvm/cli.go and jvm/option_table_loader.go
• classloader/classloader.go <--- One-off loading of java/lang/Class during init is unnecessary

The complete list of files to convert i.e. TBD (mostly, log.Log calls to trace.Trace calls conditioned on the new globals.Trace* flags):

1. classloader/archives.go
2. classloader/classes.go
3. classloader/classloader.go
4. classloader/formatCheck.go
5. classloader/jmodBase.go
6. classloader/jmodBytes.go
7. classloader/jmodMap.go
8. classloader/methArea.go
9. classloader/methodParser.go
10. classloader/parser.go
11. exceptions/catchFrame.go
12. exceptions/errors.go
13. exceptions/throw.go
14. frames/frames.go
15. gfunction/gfunctionExec.go
16. gfunction/javaIoFile.go
17. gfunction/javaLangClass.go
18. gfunction/javaLangMath.go
19. gfunction/javaLangStackTraceElement.go
20. gfunction/javaLangSystem.go
21. gfunction/javaLangThrowable.go
22. gfunction/javaMathBigInteger.go
23. globals/globals.go // <------ CLI options in concert with jvm/cli.go and jvm/option_table_loader.go
24. jvm/cli.go
25. jvm/initializerBlock.go
26. jvm/instantiate.go
27. jvm/jvmStart.go
28. jvm/run.go
29. jvm/runUtils.go
30. native/nativeFuncExec.go
31. native/nativeInit.go
32. native/osBridgePosix.go
33. native/osBridgeWindows.go
34. object/string.go
35. statics/statics.go
36. util/execUtilities.go