* Share unix getexepath() definition via src/native

* Address CR feedback

* Remove duplicate property

* Inline variable with single usage

* Fix include path in tests

* Remove unixcoreruncommon static lib dependency

* Merge coreruncommon.{cpp,h} into corerun.cpp

* Include local headers before the first use

* Remove Unix case from (Win32 only) corerun

* Use realpath in getauxval case

* Delete obsolete comment