2.1.5; documentation build failure

[Daiki Ueno]

I noticed a minor build failure when building gnupg from git:

$ git clean -xdff
$ ./autogen.sh
$ ./configure --sysconfdir=/etc --enable-maintainer-mode
$ make
...
gnupg.texi:4: @include: could not find defs.inc
gnupg.texi:29: warning: undefined flag: VERSION

I guess defs.inc should be properly marked as prerequisites, or the file
should be renamed back to version.texi?

  (info "(automake) Texinfo") mentions:

     If the ‘.texi’ file ‘@include’s ‘version.texi’, then that file will
  be automatically generated.

Regards,
-- 
Daiki Ueno