Added static data segment support to the new Runtime.loadLibrary() features. This...

Added static data segment support to the new Runtime.loadLibrary() features.  This also replaces static data segment scanning for all apps by dropping rt_scanStaticData() in favor of a new initialization step that calls gc_addRange() for each static data segment.  The upshot of this is that all GCs must track add/remove Root and Range calls so the info can be passed to a proxy if gc_setProxy() is called.  See src/gc/stub/gc.d for a simple implementation of this.

git-svn-id: http://svn.dsource.org/projects/druntime/trunk@39 4a9d5153-6564-4b3f-b5e1-7e8e9dac548f