Allow cross-page trace linking again.

The SMC problem was solved in following manner:

 - Every trace linked to another remembers when it was linked (a special timestamp value called traceLinkTimeStamp)
 - When true SMC happens it incremements the traceLinkTimeStamp
 - Jump to the linked trace won't be allowed if traceLinkTimeStamp in the link doesn't match traceLinkTimeStamp

So SMC effectively breaks all trace links and therefore I should not care for them anymore

5%-10% speedup on OS boot benchamarks observed


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11731 6c8e4198-a580-4521-a02f-c9ae86df1db9
Thanks to avanced trace linking 256K entries ICache is not needed anymore.
Reduce to 64K entries and save memory.


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11732 6c8e4198-a580-4521-a02f-c9ae86df1db9