gnuradio: break dependency chain by using 'depends on'

This commit fixes the following recursive dependency:

package/python/Config.in:5:error: recursive dependency detected!
package/python/Config.in:5:	symbol BR2_PACKAGE_PYTHON is selected by BR2_PACKAGE_GNURADIO_PYTHON
package/gnuradio/Config.in:46:	symbol BR2_PACKAGE_GNURADIO_PYTHON is selected by BR2_PACKAGE_GNURADIO_UTILS
package/gnuradio/Config.in:55:	symbol BR2_PACKAGE_GNURADIO_UTILS depends on BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS
package/python-numpy/Config.in:1:	symbol BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS depends on BR2_PACKAGE_PYTHON

by replacing the "select BR2_PACKAGE_PYTHON" by a "depends on
BR2_PACKAGE_PYTHON", and ditto for the BR2_PACKAGE_GNURADIO_PYTHON
selection.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gnuradio/Config.in

@@ -45,17 +45,16 @@ config BR2_PACKAGE_GNURADIO_FEC
 
 config BR2_PACKAGE_GNURADIO_PYTHON
 	bool "python support"
+	depends on BR2_PACKAGE_PYTHON
 	depends on BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS
 	select BR2_PACKAGE_BOOST_PYTHON
-	select BR2_PACKAGE_PYTHON
 	select BR2_PACKAGE_PYTHON_NUMPY # runtime
 	help
 	  Enable python component
 
 config BR2_PACKAGE_GNURADIO_UTILS
 	bool "gr-utils support"
-	depends on BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS
-	select BR2_PACKAGE_GNURADIO_PYTHON
+	depends on BR2_PACKAGE_GNURADIO_PYTHON
 	help
 	  Misc python utilities