Added implementation of C_WrapKey, C_UnwrapKey, and C_DeriveKey.

BUG=chromium-os:20415,chromium-os:20587
TEST=make runtests
     manual tests on x86-zgb
     > sudo /usr/sbin/chapsd libopencryptoki.so &
     > ./chapsd_test --use_dbus
     > ./chapsd_test

Change-Id: Ie7cf6dcd7be5ccabb7ae2f102b554832f6645aad
12 files changed