[CMake] bugpoint depends on intrinsics_gen

CrashDebugger.cpp has the following include chain:

llvm/Analysis/TargetTransformInfo.h
llvm/IR/IntrinsicInst.h
llvm/IR/Function.h
llvm/IR/Argument.h
llvm/IR/Attributes.h
llvm/IR/Attributes.gen

This means bugpoint needs to depend on intrinsics_gen.

llvm-svn: 287402