elisp-manual-21-2.8 Makefile does not conform to GNU standards

[Nelson H. F. Beebe]

The configure-generated Makefile for elisp-manual-21-2.8 does not
conform to GNU standards: it lacks targets "all" and "check", causing
this standard recipe to fail:

        ./configure && make all check install

The missing ones should be supplied, even though for this package,
they need do nothing.

See Emacs info node (make)Standard Targets for Users.

-------------------------------------------------------------------------------
- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- Center for Scientific Computing       FAX: +1 801 585 1640, +1 801 581 4148 -
- University of Utah                    Internet e-mail: beebe@math.utah.edu  -
- Department of Mathematics, 110 LCB        beebe@acm.org  beebe@computer.org -
- 155 S 1400 E RM 233                       beebe@ieee.org                    -
- Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe  -
-------------------------------------------------------------------------------