Fix make_simple_ref for pic address with big offsets

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23584 3ad0048d-3df7-0310-abae-a5850022a9f2
 Add unittargetdir creation as prerequisite to gppc386 compilation

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23585 3ad0048d-3df7-0310-abae-a5850022a9f2