Continue using the temp. stack of mtcp_restart.c
- Also added comments to clarify the logic.


git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2593 ba6dc0ae-232f-0410-883f-9ebac64fc565
Improve mtcp Makefile's for easier debugging.
- This works:  cd src/mtcp; make -f Makefile.mtcp gdb


git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2594 ba6dc0ae-232f-0410-883f-9ebac64fc565