SPI not ready for public consumption due to the problem of using dyninst internal

[tylergu]

SPI is using one of the dyninst internal header file.

In particular, SPI is using arch-x86.h under common/src. As this file is platform specific, dyninst is not supposed to expose this.

Right now, a custom built dyninst is used. To build this customized dyninst:

1. Move arch-x86.h from common/src to common/h
2. Remove the include statement of #include "common/src/Types.h" inside the new arch-x86.h, add include statement to include dyntypes.h, and manually add the missing definitions to arch-x86.h
3. Add COMMON_EXPORT before class and function names
4. Change the include statements #include "common/src/arch-x86.h" in other files inside dyninst to #include "arch-x86.h". Current files that need to be changed are:
   • common/src/arch-x86.C
   • common/src/arch.h
   • instructionAPI/src/Instruction.C
   • instructionAPI/src/InstructionDecoder-x86.C
   • instructionAPI/src/Operation.C

A long term solution would be to expose codegenAPI from dyninst, so that SPI can directly use emit-* functions.