Jikes RVM Historic Svn

disable runs on piccolo until we get hg working on AIX.
No point in continuing to test an old svn version.

put hg in path on piano

missing :

put /usr/local/bin in PATH on piano

Set all regression machines except piccolo to automatically switch over to mercurial.

Refined attempt to make a regression machines automatically switch over to mercurial.

Attempt to make a regression machines automatically switch over to mercurial.

Move assertion on heavy lock state to within lock mutex to avoid possible race with inflation code

A (mostly) working concurrent on-the-fly implementation of the first
Sapphire phase

Merge up to 7ccc0f5e83f130e2bc668285ee9cc0f570cf3b42

Late binding of offset and id for referent field when making reference types traced.