[recipes] Update README.md

[Matthias Clasen <matthiasc src gnome org>]

commit 83e6f274a40268f557d240f8049c49f91959b5d6
Author: matthiasclasen <matthias clasen gmail com>
Date:   Thu Dec 29 14:21:36 2016 -0500

    Update README.md
    
    We can actually use gspell on OS X. Update the build instructions to reflect that.

 README.md |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/README.md b/README.md
index 89b181f..a3d1623 100644
--- a/README.md
+++ b/README.md
@@ -63,18 +63,19 @@ brew install libtool
 brew install gettext
 brew install pkg-config
 ```
-- Install GTK+:
+- Install GTK+ and other dependencies:
 ```
 brew install gtk+3
 brew install adwaita-icon-theme
+brew install gspell
 ```
 - Clone from git:
 ```
 git clone git://git.gnome.org/recipes.git
 ```
-- biuld from git as usual, disabling some dependencies:
+- Build from git as usual, disabling some problematic dependencies:
 ```
 cd recipes
-./autogen --disable-gspell --disable-autoar
+./autogen --disable-autoar
 make
 ```