Initial version of a LOC counter class

Initial version of a LOC counter class

Usage:
 INHERIT += "cloc"

 cloc --sum-reports `find tmp/work/ -name "*clocreport" | grep -v "\-native"` --out cloc-summary.report

cloc needs to be installed on the host.

Change-Id: I70c7e707405c718b1685d49f4e84216c5408d2fb
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/10437
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>