[gentoo-kernel] Harden Gentoo Kerrnel

[disrupt_the_flow]

Hello.I dont know if this is the correct ML to post this to. but here it 
goes.

Please consider reviewing and merging hardening options from the 
linux-hardened project.https://github.com/anthraxx/linux-hardened

Also consider revieing this 
https://www.whonix.org/wiki/Hardened-kernel.Using an older kernel like 
the LTS Linux kernel will signifiocantly reduce the attack surface