Revert "Intercept EIP overriding"

Wrong way! Overridden EIP value is already concretized at the
moment. There is no way to tell apart which EIP accessing is
our target event.

This reverts commit 75fe0b93be99ac7b689427cd70a1db998e9d570f.
Add onEipCorrupt callback to Exploit plugin

Signed-off-by: Lance Chen <cyen0312@gmail.com>
Intercept EIP overriding and hook up Exploit plugin

Signed-off-by: Lance Chen <cyen0312@gmail.com>