FORTIFY_SOURCE=3 python linux-tools build issue

Hi,

We have used already FORTIFY_SOURCE=3 in our builds and found a issue, when python is compiled with it.

Compiling linux-tools results into following error:

make[2]: Leaving directory '/tmp/makepkg/linux-tools/src/linux/tools/lib/subcmd'
  GEN     python/perf.cpython-311-x86_64-linux-gnu.so
<command-line>: error: "_FORTIFY_SOURCE" redefined [-Werror]
<command-line>: note: this is the location of the previous definition
cc1: all warnings being treated as errors
error: command '/usr/bin/gcc' failed with exit code 1
cp: cannot stat 'python_ext_build/lib/perf*.so': No such file or directory
make[1]: *** [Makefile.perf:678: python/perf.cpython-311-x86_64-linux-gnu.so] Error 1
make[1]: *** Waiting for unfinished jobs....
  LD      /tmp/makepkg/linux-tools/src/linux/tools/perf/libbpf/staticobjs/libbpf-in.o
  LINK    /tmp/makepkg/linux-tools/src/linux/tools/perf/libbpf/libbpf.a
make[2]: Leaving directory '/tmp/makepkg/linux-tools/src/linux/tools/lib/bpf'

Compiling python with FORTIFY_SOURCE=2 does fix this issue.

Since Arch is considering to switch to FORTIFY=3 in the near future, please change here to FORTIFY=2.