bird2: update to 2.16.1

The bird package has been updated to include a patch that directly fixes the
alignment issue, which previously required the use of the -mno-unaligned-access
GCC flag on ARM processors. This patch, originally discussed on the BIRD mailing
list [0], modifies the net_addr structure to resolve the alignment problem
without needing the workaround.

By incorporating this patch, the alignment issue is addressed more efficiently,
eliminating the performance, code size, and hardware optimization drawbacks
associated with the GCC flag.

Release Notes:
http://trubka.network.cz/pipermail/bird-users/2025-January/018041.html

[0] - http://trubka.network.cz/pipermail/bird-users/2024-December/017957.html

Signed-off-by: Nick Hainke <vincent@systemli.org>

bird2/Makefile

@@ -7,12 +7,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=bird2
-PKG_VERSION:=2.16
+PKG_VERSION:=2.16.1
 PKG_RELEASE:=1
 
 PKG_SOURCE:=bird-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://bird.network.cz/download/
-PKG_HASH:=6629110293af6f1727967121d64f9c8dc94ed6181c4ef8b1dc51c7fdd669871c
+PKG_HASH:=f6e59cbccaca62668aea02068724bd427b9ec449c7e0f0fc5681503988c735b4
 
 PKG_MAINTAINER:=Toke Høiland-Jørgensen <toke@toke.dk>
 PKG_LICENSE:=GPL-2.0-or-later
@@ -97,10 +97,6 @@ protocols, telling BIRD to show various information, telling it to show
 a routing table filtered by a filter, or asking BIRD to reconfigure.
 endef
 
-ifeq ($(ARCH),arm)
-TARGET_CFLAGS+=-mno-unaligned-access
-endif
-
 CONFIGURE_ARGS += --disable-libssh
 
 define Package/bird2/conffiles