libenca: Move build host tool to PRE_BUILD_HOOKS

The make_hash host tool, should be built during a PRE_BUILD_HOOKS and
not a POST_CONFIGURE_HOOKS.

Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libenca/libenca.mk

@@ -21,6 +21,6 @@ define LIBENCA_MAKE_HOST_TOOL
 	$(MAKE) -C $(@D)/tools $(HOST_CONFIGURE_OPTS) make_hash
 endef
 
-LIBENCA_POST_CONFIGURE_HOOKS += LIBENCA_MAKE_HOST_TOOL
+LIBENCA_PRE_BUILD_HOOKS += LIBENCA_MAKE_HOST_TOOL
 
 $(eval $(autotools-package))