+ make $SUBARCH (cputypestr) and $FPCABI available to configuration files

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@29124 3ad0048d-3df7-0310-abae-a5850022a9f2
+ handle -Cp in the first options processing pass

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@29125 3ad0048d-3df7-0310-abae-a5850022a9f2