Updated kernel-generic.SlackBuild for x86_64
Added config-generic-3.2.52.x64

Used the config from
ftp://ftp.slackware.com/pub/slackware/slackware64-14.1/testing/source/config-testing-3.4.66/config-generic-3.4.66.x64
as basis for 'make oldconfig'.
grsec conf for config-generic-3.2.52.x64