This is a collection of various trivial fixes on stuff I noticed when reviewing the accumulated changes in the build system the last months.

The majority of the fixes is updating the copyright year for modified files. On top of this, there's also a few other fixes:

* Fix spaces and indentation.
* Fix typo.
* Remove all usages of USE_NEW_HOTSPOT_BUILD.
* Use - instead of / for compiler options, even on Windows.
* Remove old hotspot workaround for logging.