Refactor emitting of deoptimization descriptors for calls.

Refactor emitting of deoptimization descriptors for calls.

Instead of emitting the descriptor in EmitNativeCode, the
instruction prologue now emits the descriptor automatically.
To do that all instructions that need such a descriptor have
CanBecomeDeoptimizationTarget set to true.

I moved the duplicated for TargetEntryInstr::EmitNativeCode
to intermediate_language.cc.

R=vegorov@google.com

Committed: https://code.google.com/p/dart/source/detail?r=40150

[Florian Schneider, 2014-09-11 13:15:20]

fschneider@google.com changed reviewers:
+ vegorov@google.com

[Vyacheslav Egorov (Google), 2014-09-11 13:30:13]

lgtm

[Florian Schneider, 2014-09-11 13:54:29]

Committed patchset #1 (id:1) manually as r40150 (presubmit successful).