* Clean up i386-Linux startup code for shared libraries:
  * The initialization code is a normal function called by runtime linker, stack layout at process startup is irrelevant.
  * Stack pointer can be replaced by frame pointer, they are just a few bytes away.
  * IsLibrary is set to true in fpc_libinitializeunits and therefore assigning it here is redundant.
  * The exitcode is passed as argument to haltproc, so messing with PIC is not necessary.


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26759 3ad0048d-3df7-0310-abae-a5850022a9f2