package: nftables backport of reproducible builds patches

package: nftables backport of reproducible builds patches

Building `nftables` twice results in slightly different binaries and since
it's including in the OpenWrt default firmware, breaks reproducibility of
shipped artifacts.

Enabling autoreconf, since the patches introduce a `nftvbersion.h.in` file.

This commit backports patches netfilter to fix this:

* https://git.netfilter.org/nftables/commit/?id=ca86f206c92704170a295b8dc7a41f6448835dde
* https://git.netfilter.org/nftables/commit/?id=b92571cc59ce49fdd9fe2daac9350529adfb2424
* https://git.netfilter.org/nftables/commit/?id=2a0ec8a7246e5c5eb85270e3d4de43e20a00c577

Fixes: https://github.com/openwrt/openwrt/issues/23709
Link: https://github.com/openwrt/openwrt/pull/23735
Signed-off-by: Paul Spooren <mail@aparcar.org>