package/python: clarify that this refers to the deprecated 2.7 series

Python 2.7 is EOL, so people should use the python3 package instead if
possible.  Make it a bit more obvious that 'python' is not the right package
to use by explicitly mentioning that this is about python 2.7 and that it is
deprecated.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python/Config.in

@@ -3,7 +3,7 @@ comment "python needs a toolchain w/ wchar, threads, dynamic library"
 	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS
 
 config BR2_PACKAGE_PYTHON
-	bool "python"
+	bool "python2.7 (deprecated)"
 	depends on BR2_USE_WCHAR
 	# uses fork()
 	depends on BR2_USE_MMU