[X86] Model ADC/SBB with immediate 0 more accurately in the Haswell scheduler model

Haswell and possibly Sandybridge have an optimization for ADC/SBB with immediate 0 to use a single uop flow. This only applies GR16/GR32/GR64 with an 8-bit immediate. It does not apply to GR8. It also does not apply to the implicit AX/EAX/RAX forms.

Differential Revision: https://reviews.llvm.org/D59058

llvm-svn: 355635