gnu: emacs-evil: Add info page.

* gnu/packages/emacs-xyz.scm (emacs-evil): Add info page.
[arguments]: Add phase make-info.
[native-inputs]: Add texinfo.

Signed-off-by: Oleg Pykhalov <go.wigust@gmail.com>

gnu/packages/emacs-xyz.scm

@@ -9392,8 +9392,14 @@ (define-public emacs-evil
            (lambda _
              (substitute* "evil-test-helpers.el"
                (("\\(undo-tree-mode 1\\)") ""))
-             #t)))))
+             #t))
+         (add-before 'install 'make-info
+           (lambda _
+             (with-directory-excursion "doc/build/texinfo"
+                 (invoke "makeinfo" "--no-split"
+                         "-o" "evil.info" "evil.texi")))))))
     (build-system emacs-build-system)
+    (native-inputs `(("texinfo" ,texinfo)))
     (home-page "https://github.com/emacs-evil/evil")
     (synopsis "Extensible Vi layer for Emacs")
     (description