Handle the list of code-stub types using macro expansion

Handle the list of code-stub types using macro expansion.

As the list of code-stubs is used in two places it is now handled through a macro to keep this in sync. As some code-stubs is only used on ARM the list have been split into two parts to indicate this and get rid of dummy implementation on ia32 and x64 platforms.

BUG=484
Committed: http://code.google.com/p/v8/source/detail?r=3127

[Søren Thygesen Gjesse, 2009-10-26 12:10:43]

The simple fix for 484 would of cause be to just add RegExpCEntry to the case in
CodeStub::MajorName...

[Mads Ager (chromium), 2009-10-26 12:24:48]

LGTM