[recipes] Add build instructions for OS X

[Matthias Clasen <matthiasc src gnome org>]

commit 1a23a663d05c869fb3f2d4b356c7732ed357111b
Author: matthiasclasen <matthias clasen gmail com>
Date:   Thu Dec 29 13:51:29 2016 -0500

    Add build instructions for OS X
    
    This worked for me. Your mileage may vary.

 README.md |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)
---
diff --git a/README.md b/README.md
index 98b36f4..89b181f 100644
--- a/README.md
+++ b/README.md
@@ -49,3 +49,32 @@ After installing the Flatpak with either method, the applications will show up i
 ```
 flatpak run org.gnome.Recipes
 ```
+Other platforms
+---------------
+
+GNOME recipes has been successfully built on OS X. The following steps should get you there:
+
+- Install [Homebrew](http://brew.sh/)
+- Install autotools:
+```
+brew install autoconf
+brew install automake
+brew install libtool
+brew install gettext
+brew install pkg-config
+```
+- Install GTK+:
+```
+brew install gtk+3
+brew install adwaita-icon-theme
+```
+- Clone from git:
+```
+git clone git://git.gnome.org/recipes.git
+```
+- biuld from git as usual, disabling some dependencies:
+```
+cd recipes
+./autogen --disable-gspell --disable-autoar
+make
+```