python3: add python -> python3 symlink for the host variant

The target python3 depends on host-python3, but most of the scripts
call "python", so we need to ensure that $(HOST_DIR)/usr/bin/python
exists. This patch achieves this by creating a python -> python3
symbolic link in $(HOST_DIR), just like we are already doing for the
target Python 3.

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

package/python3/python3.mk

@@ -159,5 +159,11 @@ ifneq ($(BR2_PACKAGE_PYTHON),y)
 PYTHON3_POST_INSTALL_TARGET_HOOKS += PYTHON3_INSTALL_SYMLINK
 endif
 
+define HOST_PYTHON3_INSTALL_SYMLINK
+	ln -fs python3 $(HOST_DIR)/usr/bin/python
+endef
+
+HOST_PYTHON3_POST_INSTALL_HOOKS += HOST_PYTHON3_INSTALL_SYMLINK
+
 $(eval $(autotools-package))
 $(eval $(host-autotools-package))