INSTALL: Rebuilt.

        * INSTALL: Rebuilt.
        * install.texi: Remove "Object File Differences" section.  Remove
        all references to zzz.o failing comparison tests.
        * version.c, version.h: Renamed from zzz.c and zzz.h.  Remove
        date and time stamps so a 3 stage build reports no differences.
        * Make-lang.in: Corresponding changes.
        * Makefile.in: Likewise.
        * g77.c, parse.c: Likewise.
So 3-stage build compares OK.  Rename zzz.[ch] files to version.[ch].

From-SVN: r14824