Refactoring AOT code:

- Made most tool's klasses and methods package private and final (biggest change).
- AOT library sections renaming to shorter names, replacing 'JVM' in their global names with 'A' (Window's linker does not allow names starting with '.')
- Split MethodCounters GOT cells into separate section - now .kls.got (original .metaspace.got) section will have only klass pointers.
- Made .method.metadata RO section - it is next big section after .text and it was incorrectly marked as RW due to old implementation.
- Split big Main.java into separate class:
   Collector.java - collects classes and methods to compile based on flags;
   Linker.java - check if linker is present on machine and execute linking;
   Options.java - process flags.
- Moved various print methods from Main.java to LogPrinter.java.
- Split StubInformation.java from CompiledMethodInfo.java.
- Renamed MiscUtils to CallInfo class.
- Removed unused RelocType and other values.
- Fixed Eclipse warnings (for example, removed unused imports).