Fix <rdar://problem/5602936> Need to resolve new GCC 4.2 warnings.

Fix <rdar://problem/5602936> Need to resolve new GCC 4.2 warnings.

Reviewed by Tim Hatcher.

Fix all warnings emitted by GCC 4.2 when building JavaScriptCore.  This allows builds with
-Werror to succeed.  At present they will crash when executed due to code that is not safe
under strict aliasing (<rdar://problem/5536806>).

This required some format strings to be modified in WebCore and WebKit as their format
specifiers did not match the argument type.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@27947 268f45cc-cd09-0410-ab3c-d52691b4dbfc