[dist] Add cls property Arch.nice_arch

So we can get arch name without hyphen and with CamelCase.
We will use this to add an arch suffix to our dists.

Author: opacam

pythonforandroid/archs.py

@@ -66,6 +66,11 @@ def include_dirs(self):
                 d.format(arch=self))
             for d in self.ctx.include_dirs]
 
+    @property
+    def nice_arch(self):
+        '''Returns `Arch.arch` without hyphen and in Camel Case format'''
+        return ''.join([i.title() for i in self.arch.split('-')])
+
     @property
     def target(self):
         # As of NDK r19, the toolchains installed by default with the