android build: pin hashes of p4a recipes

contrib/android/p4a_recipes/sdl2_mixer/__init__.py

@@ -0,0 +1,18 @@
+import os
+
+from pythonforandroid.recipes.sdl2_mixer import LibSDL2Mixer
+from pythonforandroid.util import load_source
+
+util = load_source('util', os.path.join(os.path.dirname(os.path.dirname(__file__)), 'util.py'))
+
+
+assert LibSDL2Mixer._version == "2.0.4"
+assert LibSDL2Mixer.depends == []
+assert LibSDL2Mixer.python_depends == []
+
+
+class LibSDL2MixerPinned(util.InheritedRecipeMixin, LibSDL2Mixer):
+    sha512sum = "98c56069640668aaececa63748de21fc8f243c7d06386c45c43d0ee472bbb2595ccda644d9886ce5b95c3a3dee3c0a96903cf9a89ddc18d38f041133470699a3"
+
+
+recipe = LibSDL2MixerPinned()