toolchain: fortify-headers: Update to version 2.3.3

toolchain: fortify-headers: Update to version 2.3.3

Update to recent fortify-headers version. This version also supports
_FORTIFY_SOURCE=3.

Changes: https://github.com/jvoisin/fortify-headers/compare/1.1...2.3.3

A patch similar to the removed one was applied upstream:
https://github.com/jvoisin/fortify-headers/commit/b40f6d87482f20e968b27470baca042e50cd6792

The root file system is getting a bit bigger.
Without this commit:
5250380 bin/targets/armsr/armv8/openwrt-armsr-armv8-generic-rootfs.tar.gz
4919997 bin/targets/malta/be/openwrt-malta-be-default-rootfs.tar.gz
With this commit:
5263407 bin/targets/armsr/armv8/openwrt-armsr-armv8-generic-rootfs.tar.gz
4930011 bin/targets/malta/be/openwrt-malta-be-default-rootfs.tar.gz

Link: https://github.com/openwrt/openwrt/pull/20313
Signed-off-by: Hauke Mehrtens <[email protected]>