Use correct CFBundleExecutable in the Info.plist for Python.app

The Python build machinery apparently does not use proper autoconfigury to
expand this Info.plist.in file, so can't use @PYTHONFRAMEWORK@ as for the
Info.plist for the framework itself, but have to hardcode LibreOfficePython.

As such I am not sure that Python's way of including an app bundle
inside a framework's Resources subtree is acceptable in the stricter
code signing and Gatekeeper rules that soon will be in effect. Will
see.

Change-Id: I1ef9e7b748d41ec4b32d80e721d5fba5e7a90d18

external/python3/python-3.3.0-darwin.patch.1

@@ -72,3 +72,14 @@ no /usr/include.
  	<key>CFBundleGetInfoString</key>
  	<string>Python Runtime and Library</string>
  	<key>CFBundleIdentifier</key>
+--- python3/Mac/Resources/app/Info.plist.in
++++ python3/Mac/Resources/app/Info.plist.in
+@@ -18,7 +18,7 @@
+ 		</dict>
+ 	</array>
+ 	<key>CFBundleExecutable</key>
+-	<string>Python</string>
++	<string>LibreOfficePython</string>
+ 	<key>CFBundleGetInfoString</key>
+ 	<string>%version%, (c) 2004-2013 Python Software Foundation.</string>
+ 	<key>CFBundleHelpBookFolder</key>