dtc: install libfdt library and headers for host variant

The dtc package currently does not install libfdt for the host install.
It can be useful to have libfdt on the host, such as for building QEMU
with the --enable-fdt configure switch.

Signed-off-by: David Raeman <draeman@bbn.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/dtc/dtc.mk

@@ -51,7 +51,9 @@ define HOST_DTC_BUILD_CMDS
 endef
 
 define HOST_DTC_INSTALL_CMDS
-	$(MAKE) -C $(@D) PREFIX=$(HOST_DIR)/usr install-bin
+	$(MAKE) -C $(@D) PREFIX=$(HOST_DIR)/usr install-bin install-lib \
+		install-includes
+
 endef
 
 $(eval $(generic-package))