Remove restoreFinishPtr from ProcessInfo.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2590 ba6dc0ae-232f-0410-883f-9ebac64fc565
Restore stack inside mtcp/tlsinfo.c.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2591 ba6dc0ae-232f-0410-883f-9ebac64fc565
Restore TLSState for main thread in mtcp/tlsinfo.c.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2592 ba6dc0ae-232f-0410-883f-9ebac64fc565