Implement DoCallKeyed for arm lithium compiler.

Implement DoCallKeyed for arm lithium compiler.

Per the LChunkBuilder::DoCallKeyed the key value is placed into r2 where the KeyedCallIC expects it already so, inspired by the ia32 implementation and the DoCallNamed this code seems to be all that is required.

I ran the arm tests:
./tools/test.py --simulator=arm -j4

also presubmit.py (clean)

and constructed code that did trigger lithium compilation of the keyed call instruction. Before my change the code caused bailout due to unimplemented DoCallKeyed, after the change, the lithium compilation succeeded, and the code worked.

Thank you!
Martin

Landed in r6234.

[Mads Ager (chromium), 2011-01-10 07:56:08]

LGTM