[jhc] darcs patch: add rts/test directory (and 4 more)

Sat Feb 11 16:47:06 PST 2012 John Meacham * add rts/test directory Sat Feb 11 18:27:18 PST 2012 John Meacham * reorganize rts/ directory, add README for it Sat Feb 11 19:11:48 PST 2012 John Meacham * add unit tests for stableptr Sat Feb 11 20:02:46 PST 2012 John Meacham * move slub.c and jhc_jgc.* to rts directory Sat Feb 11 21:38:38 PST 2012 John Meacham * make 'Requires' a simple set, include the calling convention with the requirements.