+ Write 'non-executable stack' marker to object files also on FreeBSD (verified for version 9.0 for i386).
+ Write correct ABI value into ELF header for FreeBSD.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26745 3ad0048d-3df7-0310-abae-a5850022a9f2