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/python-mad/Config.in

@@ -0,0 +1,9 @@
+config BR2_PACKAGE_PYTHON_MAD
+	bool "python-mad"
+	depends on BR2_PACKAGE_PYTHON
+	select BR2_PACKAGE_LIBMAD
+	help
+	  python-mad is a Python binding for the MAD library, a
+	  high-quality integer-only MPEG decoder.
+
+	  http://spacepants.org/src/pymad/

package/python-mad/python-mad.mk

@@ -0,0 +1,41 @@
+#############################################################
+#
+# python-mad
+#
+#############################################################
+
+PYTHON_MAD_VERSION = 0.6
+PYTHON_MAD_SOURCE  = pymad-$(PYTHON_MAD_VERSION).tar.gz
+PYTHON_MAD_SITE    = http://spacepants.org/src/pymad/download/
+
+PYTHON_MAD_DEPENDENCIES = python libmad
+
+ifeq ($(BR2_ENDIAN),"LITTLE")
+PYTHON_MAD_ENDIAN=little
+else
+PYTHON_MAD_ENDIAN=big
+endif
+
+define PYTHON_MAD_CONFIGURE_CMDS
+	echo "endian = $(PYTHON_MAD_ENDIAN)" > $(@D)/Setup
+	echo "mad_libs = mad" >> $(@D)/Setup
+	echo "mad_lib_dir = $(STAGING_DIR)/usr/lib" >> $(@D)/Setup
+	echo "mad_include_dir = $(STAGING_DIR)/usr/include" >> $(@D)/Setup
+endef
+
+define PYTHON_MAD_BUILD_CMDS
+	(cd $(@D); \
+		CC="$(TARGET_CC)"		\
+		CFLAGS="$(TARGET_CFLAGS)" 	\
+		LDSHARED="$(TARGET_CC) -shared" \
+		LDFLAGS="$(TARGET_LDFLAGS)" 	\
+	$(HOST_DIR)/usr/bin/python setup.py build_ext \
+	--include-dirs=$(STAGING_DIR)/usr/include/python$(PYTHON_VERSION_MAJOR))
+	(cd $(@D); $(HOST_DIR)/usr/bin/python setup.py build)
+endef
+
+define PYTHON_MAD_INSTALL_TARGET_CMDS
+	(cd $(@D); $(HOST_DIR)/usr/bin/python setup.py install --prefix=$(TARGET_DIR)/usr)
+endef
+
+$(eval $(call GENTARGETS))