Cleaning up distclean:  Makefile vs. Makefile.in
- Removed second copy of install target in contrib/Makefile.in
- configure.ac always creates contrib/infiniband/Makefile now
   (Makefile already reports error if --enable-infiniband-support not set)


git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2361 ba6dc0ae-232f-0410-883f-9ebac64fc565