layer.conf: add socket to the hosttools
layer.conf: add socket to the hosttools

`socket` can be used in proxy scripts, add it to the nonfatal host
tools.

Signed-off-by: Gowtham Tammana <87e6166900dec7738a526b7b7fc9a138729d0724@ti.com>
Signed-off-by: Dan Murphy <50b72235ef2106735bf2282950a69d11e6d56bc7@ti.com>

rcn-ee/meta-arago,rcn-ee/meta-arago,rcn-ee/meta-arago,rcn-ee/meta-arago,rcn-ee/meta-arago