Replace the memcpy macro with a lint check.

Replace the memcpy macro with a lint check.

This fixes the build under libc++.  It also allows us to check the
Windows and Android code.  While at it, replace all uncaught instances
of memcpy with memmove.

R=sgjesse@google.com

Committed: https://code.google.com/p/dart/source/detail?r=27700

[Søren Gjesse, 2013-09-19 06:47:21]

lgtm

[Søren Gjesse, 2013-09-20 12:25:18]

Committed patchset #1 manually as r27700 (presubmit successful).