package/python-charset-normalizer: add host variant

A host variant of the python-charset-normalizer package will be needed
for the host-python-requests package.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 07fc2fb1a5625ea18c76fab906b8da83ac1f49f3)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-charset-normalizer/python-charset-normalizer.mk

@@ -10,5 +10,7 @@ PYTHON_CHARSET_NORMALIZER_SITE = https://files.pythonhosted.org/packages/9f/c5/3
 PYTHON_CHARSET_NORMALIZER_SETUP_TYPE = setuptools
 PYTHON_CHARSET_NORMALIZER_LICENSE = MIT
 PYTHON_CHARSET_NORMALIZER_LICENSE_FILES = LICENSE
+HOST_PYTHON_CHARSET_NORMALIZER_NEEDS_HOST_PYTHON = python3
 
 $(eval $(python-package))
+$(eval $(host-python-package))