+ i8086 InterLockedExchange reimplemented in asm, added locking with cli



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27404 3ad0048d-3df7-0310-abae-a5850022a9f2
+ symx86.pas added to ppc8086.lpi



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27405 3ad0048d-3df7-0310-abae-a5850022a9f2