* Build grab_vcsa only on Linux (fpmake)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24601 3ad0048d-3df7-0310-abae-a5850022a9f2
* another i8086 compilation fix for typinfo

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24602 3ad0048d-3df7-0310-abae-a5850022a9f2
+ enabled compilation of units rtlconst and typinfo for i8086-msdos

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24603 3ad0048d-3df7-0310-abae-a5850022a9f2