package/util-linux: fix host build failure

The UTIL_LINUX_FIX_DISK_UTILS_COMPILE workaround is needed for host
building too. So let's add it to HOST_UTIL_LINUX_POST_PATCH_HOOKS.
host-util-linux is used a lot, so this patch fixes a lot of future
builds.

Fixes:
http://autobuild.buildroot.net/results/b8c/b8cb40efc036a01802c914544cd4fc29dfd67af6//

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/util-linux/util-linux.mk

@@ -41,6 +41,7 @@ define UTIL_LINUX_FIX_DISK_UTILS_COMPILE
 	touch $(@D)/disk-utils/raw.8
 endef
 UTIL_LINUX_POST_PATCH_HOOKS += UTIL_LINUX_FIX_DISK_UTILS_COMPILE
+HOST_UTIL_LINUX_POST_PATCH_HOOKS += UTIL_LINUX_FIX_DISK_UTILS_COMPILE
 
 HOST_UTIL_LINUX_DEPENDENCIES = host-pkgconf