Add Recipe for Kivy3 module (#2263)

Add recipe for kivy3

Author: excepterror

pythonforandroid/recipes/kivy3/__init__.py

@@ -0,0 +1,21 @@
+from pythonforandroid.recipe import PythonRecipe
+import shutil
+
+
+class Kivy3Recipe(PythonRecipe):
+    version = 'master'
+    url = 'https://github.com/kivy/kivy3/archive/{version}.zip'
+
+    depends = ['kivy']
+    site_packages_name = 'kivy3'
+
+    '''Due to setuptools.'''
+    call_hostpython_via_targetpython = False
+
+    def build_arch(self, arch):
+        super().build_arch(arch)
+        suffix = '/kivy3/default.glsl'
+        shutil.copyfile(self.get_build_dir(arch.arch) + suffix, self.ctx.get_python_install_dir() + suffix)
+
+
+recipe = Kivy3Recipe()