Reland r23732: ARM64: Fix and improve --trace-sim register trace.

Reland r23732: ARM64: Fix and improve --trace-sim register trace.

- Use standard names (except that our GREY is the standard BLACK).
- Make non-bold colours explicit, otherwise the boldness can carry over
  into subsequent colour declarations.
- I've moved some colours around to make them consistent. Register value
  updates (which are very common) now stand out less than they did,
  making the less-common (and arguably more important) debug
  announcements appear brighter.
  - FP registers and values are now magenta.
  - Integer registers and values are now cyan.
  - Memory accesses are now blue.
- LOG_WRITE prints the source register for stores.
- Loads are logged with a format similar to that used for stores.
  Specifically, the memory address is printed alongside the new register
  value.
- Updates to D registers print the raw bits as well as the double value.
  Updates to S registers print the raw bits as well as the float value.
  (Previously, we printed both double and float interpretations of the
  bits, which was a bit cluttered.)

BUG=
R=svenpanne@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=23802

[jbramley, 2014-09-08 14:48:53]

jacob.bramley@arm.com changed reviewers:
+ svenpanne@chromium.org, ulan@chromium.org

[jbramley, 2014-09-08 14:48:54]

This is r23732 (plus the fix in r23733) with a different workaround for the
array-size issue. Sven, this time I used a bigger hammer, so it should work with
your version of GCC.

[Sven Panne, 2014-09-09 08:16:57]

LGTM (rubberstamped), at least my local GCC is happy now.

[jbramley, 2014-09-09 12:43:54]

Committed patchset #1 manually as 23802 (presubmit successful).