Dump a physical page when an untrusted call chain is encountered.

Currently, the untrusted call chains are detected but no particular action will be taken other than displaying a debug message.
Alternatively, it could be interesting to dump the caller page the same way than the unknowns modules for analyzing it later on.
Merge pull request #3 from Spl3en/UntrustedCallChainBehavior

Dump a physical page when an untrusted call chain is encountered.