UBUNTU: [Packaging] rust: add the proper make flags to enable rust support

BugLink: https://bugs.launchpad.net/bugs/2007654

Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

debian/rules.d/0-common-vars.mk

@@ -238,6 +238,7 @@ kmake = make ARCH=$(build_arch) \
 	CROSS_COMPILE=$(CROSS_COMPILE) \
 	HOSTCC=$(HOSTCC) \
 	CC=$(CROSS_COMPILE)$(gcc) \
+	BINDGEN=bindgen-0.56 \
 	KERNELVERSION=$(abi_release)-$(target_flavour) \
 	CONFIG_DEBUG_SECTION_MISMATCH=y \
 	KBUILD_BUILD_VERSION="$(uploadnum)" \