Update Python shebang to version 3 and enhance pspec.xml with UTF-8 encoding, multilingual summaries, and version bump to 1.1.20

hardware/misc/solaar/actions.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 #
 # Licensed under the GNU General Public License, version 3.
@@ -13,3 +13,4 @@ def build():
 
 def install():
     pythonmodules.run("-m installer  --destdir='%s'  dist/*.whl" % get.installDIR(), pyVer="3")
+