simple solution to remove duplicates from patches and configure_args

Ensure patches and configure arguments are unique.

Author: GvozdevLeonid

pythonforandroid/recipes/python3/__init__.py

@@ -206,6 +206,8 @@ def apply_patches(self, arch, build_dir=None):
                 self.patches.append("patches/py3.7.1_fix_cortex_a8.patch")
             elif _p_version.minor >= 8:
                 self.patches.append("patches/py3.8.1_fix_cortex_a8.patch")
+
+        self.patches = list(set(self.patches))
         super().apply_patches(arch, build_dir)
 
     def include_root(self, arch_name):
@@ -322,6 +324,8 @@ def add_flags(include_flags, link_dirs, link_libs):
         if _p_version.minor >= 13 and self.disable_gil:
             self.configure_args.append("--disable-gil")
 
+        self.configure_args = list(set(self.configure_args))
+
         return env
 
     def build_arch(self, arch):