Makefile: Use Fast Math Again

* We need this to boost vfp!

Signed-off-by: Chester Kener <Cl3Kener@gmail.com>
netfilter: Fix Build Error with -ffast-math

Signed-off-by: Chester Kener <Cl3Kener@gmail.com>
Makefile: Make Host mirror Kernel flags

Signed-off-by: Chester Kener <Cl3Kener@gmail.com>