Add rts_getThreadId to the Linker's built in symbol table
/* -----------------------------------------------------------------------------
- * $Id: Linker.c,v 1.73 2001/11/08 12:46:31 simonmar Exp $
+ * $Id: Linker.c,v 1.74 2001/11/22 15:15:27 simonmar Exp $
*
* (c) The GHC Team, 2000, 2001
*
SymX(rts_getInt32) \
SymX(rts_getPtr) \
SymX(rts_getStablePtr) \
+ SymX(rts_getThreadId) \
SymX(rts_getWord) \
SymX(rts_getWord32) \
SymX(rts_mkAddr) \