package/c-ares: support host build

A host version of this package will be useful as a dependency of the
host-grpc package.

Signed-off-by: Robert Rose <robertroyrose@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/c-ares/c-ares.mk

@@ -15,3 +15,4 @@ C_ARES_LICENSE = MIT
 C_ARES_LICENSE_FILES = ares_mkquery.c
 
 $(eval $(autotools-package))
+$(eval $(host-autotools-package))