libcap: unbreak host build after auto-host-deps change

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/libcap/libcap.mk

@@ -10,6 +10,7 @@ LIBCAP_VERSION = 2.22
 LIBCAP_SITE = $(BR2_DEBIAN_MIRROR)/debian/pool/main/libc/libcap2
 LIBCAP_SOURCE = libcap2_$(LIBCAP_VERSION).orig.tar.gz
 LIBCAP_DEPENDENCIES = host-libcap
+HOST_LIBCAP_DEPENDENCIES =
 LIBCAP_INSTALL_STAGING = YES
 
 define LIBCAP_BUILD_CMDS