package/dhcpcd: create /var/db/dhcpcd

Fixes:
 - https://bugs.buildroot.org/show_bug.cgi?id=13506

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/dhcpcd/dhcpcd.mk

@@ -40,6 +40,7 @@ endef
 
 define DHCPCD_INSTALL_TARGET_CMDS
 	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) install DESTDIR=$(TARGET_DIR)
+	mkdir -p $(TARGET_DIR)/var/db/dhcpcd
 endef
 
 # When network-manager is enabled together with dhcpcd, it will use