Always generate full unoptimized code for intrinsified methods.

Always generate full unoptimized code for intrinsified methods.

Until now, we skipped regular code generation for some intrinsics
because the body was unreachable (no slow case).

With inlining and optimizing those methods, we may need the 
unoptimized code for deoptimization support. Instead of deciding
case-by-case which of these methods may potentially deoptimize,
we always generate the full unoptimized code now, together
with the corresponding deoptimization info.

R=srdjan@google.com

Committed: https://code.google.com/p/dart/source/detail?r=26703

[srdjan, 2013-08-26 16:03:54]

lgtm

[Florian Schneider, 2013-08-27 11:14:15]

Committed patchset #2 manually as r26703 (presubmit successful).