p11-kit: install p11-kit server and p11-kit-client binaries

[sah-cdo]

Run a server process that exposes PKCS#11 module remotely.

p11-kit server pkcs11:token1 pkcs11:token2 ...
p11-kit server --provider /path/to/pkcs11-module.so pkcs11:token1 pkcs11:token2 ...

This launches a server that exposes the given PKCS#11 tokens on a local socket. The tokens must belong to the same module. To access the socket, use p11-kit-client.so module. The server address and PID are printed as a shell-script snippet which sets the appropriate environment variable: P11_KIT_SERVER_ADDRESS and P11_KIT_SERVER_PID

Maintainer: me / @<github-user> (find it by checking history of the package Makefile) Compile tested: (put here arch, model, OpenWrt version) Run tested: (put here arch, model, OpenWrt version, tests done)

Reviewer: @neheb