android build: pin hashes of p4a recipes

contrib/android/p4a_recipes/pycparser/__init__.py

@@ -0,0 +1,13 @@
+from pythonforandroid.recipes.pycparser import PycparserRecipe
+
+
+assert PycparserRecipe._version == "2.14"
+assert PycparserRecipe.depends == ['setuptools', 'python3']
+assert PycparserRecipe.python_depends == []
+
+
+class PycparserRecipePinned(PycparserRecipe):
+    sha512sum = "d5b9ab434a8944898ac23a4f51189db77b02b993bf3e3ca018852b117fc0eb43e460b156beaa5c1d631ad71c81e1649113e9fff7e33506b1e7d4de24d8b464c6"
+
+
+recipe = PycparserRecipePinned()