guile: Fix doc building

configure.ac

@@ -276,7 +276,6 @@ lib/index/Makefile
 mu4e/Makefile
 mu4e/mu4e-meta.el
 guile/Makefile
-guile/texi.texi
 guile/mu/Makefile
 guile/examples/Makefile
 guile/tests/Makefile

guile/meson.build

@@ -30,7 +30,8 @@ scm_compiler=join_paths(meson.current_build_dir(), 'compile-scm')
 
 snarf = find_program('guile-snarf')
 snarf_args=['-o', '@OUTPUT@', '@INPUT@', '-I' + meson.current_source_dir() + '/..',
-	    '-I' + meson.current_source_dir() + '/../lib']
+	    '-I' + meson.current_source_dir() + '/../lib',
+	    '-I' + meson.current_build_dir() + '/..']
 
 pkg_config=find_program('pkg-config')
 snarf_args+=run_command(pkg_config, '--cflags', 'glib-2.0', 'guile-3.0').stdout().strip()

guile/mu-guile.texi

@@ -11,7 +11,7 @@
 @documentencoding UTF-8
 @c %**end of header
 
-@include texi.texi
+@include version.texi
 
 @copying
 Copyright @copyright{} 2012 Dirk-Jan C. Binnema
@@ -28,7 +28,7 @@ Documentation License.''
 
 @titlepage
 @title @t{mu-guile} - extending @t{mu} with Guile Scheme
-@subtitle version  @value{mu-version}
+@subtitle version  @value{VERSION}
 @author Dirk-Jan C. Binnema
 
 @c The following two commands start the copyright page.

guile/texi.texi.in

@@ -1,3 +0,0 @@
-@c the version for mu for including in texinfo docs
-@set mu-version @VERSION@
-