utils/scanpypi: sort alphabetically list of required packages

That change will alphabetically set list order
of required packages in Config.in file automatically.

Example below:

before: ['python-pyserial', 'python-pyaes', 'python-ecdsa']
after:  ['python-ecdsa', 'python-pyaes', 'python-pyserial']

Signed-off-by: Bartosz Bilas <b.bilas@grinn-global.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

utils/scanpypi

@@ -612,6 +612,7 @@ class BuildrootPackage():
         bool_line = '\tbool "{name}"\n'.format(name=self.buildroot_name)
         lines.append(bool_line)
         if self.pkg_req:
+            self.pkg_req.sort()
             for dep in self.pkg_req:
                 dep_line = '\tselect BR2_PACKAGE_{req} # runtime\n'.format(
                     req=dep.upper().replace('-', '_'))