+ add random code from Francesco's GBA code

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23292 3ad0048d-3df7-0310-abae-a5850022a9f2
* make threading code dependend on feature switch

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23293 3ad0048d-3df7-0310-abae-a5850022a9f2
* stripped trailing spaces

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23294 3ad0048d-3df7-0310-abae-a5850022a9f2
* enable command line handling dummy for arm-embedded

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23295 3ad0048d-3df7-0310-abae-a5850022a9f2