Fix Stind_* instructions

[saneki]

Currently eazdevirt detects all Stind instructions as Stind_I. Add a post-devirtualize fixer for updating the opcodes of Stind instructions depending on the state of the stack at the time the instruction is reached.

Additional info:

eazdevirt/src/eazdevirt/Detection/V1/Detection.Ind.cs

Line 103 in f987581

/// All Stind_* delegate methods follow this pattern. They have different delegate