package/python-pyyaml: add host variant

host-python-pyyaml is needed for mongodb 4.0.6

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Peter: s/HOST_PYTHON/HOST_PYTHON_PYYAML/]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-pyyaml/python-pyyaml.mk

@@ -11,5 +11,7 @@ PYTHON_PYYAML_SETUP_TYPE = distutils
 PYTHON_PYYAML_LICENSE = MIT
 PYTHON_PYYAML_LICENSE_FILES = LICENSE
 PYTHON_PYYAML_DEPENDENCIES = libyaml
+HOST_PYTHON_PYYAML_DEPENDENCIES = host-libyaml
 
 $(eval $(python-package))
+$(eval $(host-python-package))