aubio recipe created (#3044)

Aubio recipe.
Note that this hasn't been ported to cross compile from macOS yet, the error on 0.4.9 was:
```
src/aubio_priv.h:95:10: fatal error: 'Accelerate/Accelerate.h' file not found
#include <Accelerate/Accelerate.h>
```

pythonforandroid/recipes/aubio/__init__.py

@@ -0,0 +1,18 @@
+"""
+Aubio recipe.
+Note that this hasn't been ported to cross compile from macOS yet,
+the error on 0.4.9 was: src/aubio_priv.h:95:10:
+fatal error: 'Accelerate/Accelerate.h' file not found
+#include <Accelerate/Accelerate.h>
+"""
+
+from pythonforandroid.recipe import PyProjectRecipe
+
+
+class AubioRecipe(PyProjectRecipe):
+    version = "0.4.9"
+    url = "https://aubio.org/pub/aubio-{version}.tar.bz2"
+    depends = ["numpy", "setuptools"]
+
+
+recipe = AubioRecipe()