Merge

8147937: Adapt SAP copyrights to new company name.
Reviewed-by: simonis, stuefe

8145184: [aix] Implement os::platform_print_native_stack on AIX
Reviewed-by: goetz

8143125: [aix] Further Developments for AIX
Summary: Port newest AIX port developemnts to OpenJDK.
Reviewed-by: goetz, simonis

8140645: Recent Developments for AIX
Summary: Port recent developments from SAP for AIX to the OpenJDK
Reviewed-by: goetz