gawk: simplify the hacks around version.c

[Stepan Kasal]

Hello,
  looking at gawk configure.ac and Makefile.am, I noticed three nits;
attached please find three tiny patches:

1) gawk-20070924-version-c.patch

I do not think the hack at the end of configure.ac is needed.
It suffices to remove version.c from AC_CONFIG_FILES and generate it
by a rule in Makefile.am.
For all use cases I can imagine, the new solution works as good as
the original hack--but I may have missed something, of course.

2) gawk-20070924-suffix-i.patch

More that three years ago, I submitted a hack involving version.i.
It's life was shorter than a week.  :-)
The .i.c rule is a residuum of that experiment and may be removed.

3) gawk-20070924-maint-clean.patch

`awkgram.c' in MAINTAINERCLEANFILES is redundant; Automake knows
about Yacc and handles that.

Have a nice day,
        Stepan Kasal

gawk-20070924-version-c.patch
Description: Text document

gawk-20070924-suffix-i.patch
Description: Text document

gawk-20070924-maint-clean.patch
Description: Text document