package/ola: fix missing numpy

OLAs RDM test option needs NumPy.

Note that we need to pass `ac_cv_have_pymod_numpy=yes` as NumPy builds some
shared libraries and ola checks for NumPy using a host Python test program
which fails with 'wrong ELF class'.

Fixes:
http://autobuild.buildroot.net/results/750/750c9bcc753e2c1b7b05d6c43fabf4c405e15f04/
http://autobuild.buildroot.net/results/24a/24ada1e0ec695cb12028048728a9d1e2bcf75a03/
http://autobuild.buildroot.net/results/111/111c5f3eed6a5931de27a1b0b02be6e2114198e6/
.. and more.

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ola/Config.in

@@ -54,6 +54,8 @@ config BR2_PACKAGE_OLA_EXAMPLES
 config BR2_PACKAGE_OLA_RDM_TESTS
 	bool "rdm tests"
 	depends on BR2_PACKAGE_OLA_PYTHON_BINDINGS
+	depends on BR2_PACKAGE_PYTHON_NUMPY_ARCH_SUPPORTS
+	select BR2_PACKAGE_PYTHON_NUMPY
 	help
 	  Build OLA RDM tests.
 

package/ola/ola.mk

@@ -87,6 +87,11 @@ endif
 
 ifeq ($(BR2_PACKAGE_OLA_RDM_TESTS),y)
 OLA_CONF_OPTS += --enable-rdm-tests
+OLA_DEPENDENCIES += python-numpy
+# needed as numpy builds some shared libraries and ola checks for
+# numpy using a host python test program which fails with 'wrong ELF
+# class'.
+OLA_CONF_ENV = ac_cv_have_pymod_numpy=yes
 else
 OLA_CONF_OPTS += --disable-rdm-tests
 endif