Python: add external modules option

all external python packages/libraries should reside in
"external python modules" section.

Move existing modules python-serial and python-mad there

Move python-mad from package/multimedia to package

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/Config.in

@@ -237,6 +237,12 @@ endif
 source "package/microperl/Config.in"
 source "package/php/Config.in"
 source "package/python/Config.in"
+if BR2_PACKAGE_PYTHON
+menu "external python modules"
+source "package/python-mad/Config.in"
+source "package/python-serial/Config.in"
+endmenu
+endif
 source "package/ruby/Config.in"
 source "package/tcl/Config.in"
 endmenu
@@ -313,7 +319,6 @@ source "package/libhid/Config.in"
 source "package/libiqrf/Config.in"
 source "package/libusb/Config.in"
 source "package/libusb-compat/Config.in"
-source "package/python-serial/Config.in"
 endmenu
 
 if BROKEN

package/multimedia/Config.in

@@ -40,7 +40,6 @@ source "package/multimedia/mplayer/Config.in"
 source "package/multimedia/musepack/Config.in"
 source "package/multimedia/portaudio/Config.in"
 source "package/multimedia/pulseaudio/Config.in"
-source "package/multimedia/python-mad/Config.in"
 source "package/multimedia/speex/Config.in"
 source "package/multimedia/tidsp-binaries/Config.in"
 source "package/multimedia/taglib/Config.in"