+ allow smartlinking and dwarf debug info at the same time for i8086-msdos



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25872 3ad0048d-3df7-0310-abae-a5850022a9f2
* put the i8086-msdos dwarf debug sections in USE32 class=DWARF segments because
  wlink wants them this way



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25873 3ad0048d-3df7-0310-abae-a5850022a9f2
+ tell wlink to add dwarf debug info to the executable when -gw2/3/4 is used



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25874 3ad0048d-3df7-0310-abae-a5850022a9f2