package/sunxi-tools: fix build dependencies

This patch fixes the dependency on libfdt for host-sunxi-tools.
Also it fixes the dependency on zlib for sunxi-tools.

Fix the following host build failure raised since commit
2e330dff6a7ce7965ceb0dccdc9dcbcb329167bb

fit_image.c:19:10: fatal error: libfdt.h: No such file or directory
   19 | #include <libfdt.h>
      |          ^~~~~~~~~~
compilation terminated.

Fixes: http://autobuild.buildroot.net/results/2677c69ac34642a7a501230e1dd22b193db0899d/
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com>
Reviewed-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Tested-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/sunxi-tools/Config.in

@@ -27,6 +27,7 @@ config BR2_PACKAGE_SUNXI_TOOLS_FEL
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # libusb
 	select BR2_PACKAGE_DTC
 	select BR2_PACKAGE_LIBUSB
+	select BR2_PACKAGE_ZLIB
 	help
 	  The sunxi-fel command can interact with a sunxi device in
 	  fel mode. This allows do download code to memory and execute

package/sunxi-tools/Config.in.host

@@ -2,6 +2,7 @@ config BR2_PACKAGE_HOST_SUNXI_TOOLS
 	bool "host sunxi-tools"
 	depends on BR2_arm
 	depends on BR2_HOST_GCC_AT_LEAST_4_9 # host-libusb
+	select BR2_PACKAGE_HOST_DTC
 	help
 	  Tools for Allwinner A10 (aka sun4i) and A13 (aka sun5i)
 	  based devices. This includes fex2bin which can be used to

package/sunxi-tools/sunxi-tools.mk

@@ -8,7 +8,7 @@ SUNXI_TOOLS_VERSION = 1.4.2-168-ged3039cdbeeb28fc0011c3585d8f7dfb91038292
 SUNXI_TOOLS_SITE = $(call github,linux-sunxi,sunxi-tools,v$(SUNXI_TOOLS_VERSION))
 SUNXI_TOOLS_LICENSE = GPL-2.0+
 SUNXI_TOOLS_LICENSE_FILES = LICENSE.md
-HOST_SUNXI_TOOLS_DEPENDENCIES = host-libusb host-pkgconf
+HOST_SUNXI_TOOLS_DEPENDENCIES = host-dtc host-libzlib host-libusb host-pkgconf
 FEX2BIN = $(HOST_DIR)/bin/fex2bin
 
 SUNXI_TOOLS_TARGETS_$(BR2_PACKAGE_SUNXI_TOOLS_FEXC) += sunxi-fexc
@@ -26,13 +26,14 @@ SUNXI_TOOLS_FEXC_LINKS += fex2bin bin2fex
 endif
 
 ifeq ($(BR2_PACKAGE_SUNXI_TOOLS_FEL),y)
-SUNXI_TOOLS_DEPENDENCIES += dtc libusb host-pkgconf
+SUNXI_TOOLS_DEPENDENCIES += dtc libusb zlib host-pkgconf
 endif
 
 define HOST_SUNXI_TOOLS_BUILD_CMDS
 	$(HOST_MAKE_ENV) $(MAKE) CROSS_COMPILE="" CC="$(HOSTCC)" \
 		PREFIX=$(HOST_DIR) EXTRA_CFLAGS="$(HOST_CFLAGS)" \
-		LDFLAGS="$(HOST_LDFLAGS)" -C $(@D) tools misc
+		LDFLAGS="$(HOST_LDFLAGS) -I$(HOST_DIR)/include/libfdt" \
+		-C $(@D) tools misc
 endef
 
 define HOST_SUNXI_TOOLS_INSTALL_CMDS