eclass/coreos-doc: add helper for including docs

sdk_container/src/third_party/coreos-overlay/eclass/coreos-doc.eclass

@@ -0,0 +1,23 @@
+# Copyright 2015 CoreOS, Inc.
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+# @ECLASS: coreos-doc.eclass
+# @BLURB: utility function for including documentation
+
+# @FUNCTION: coreos-dodoc
+# @USAGE: [-r] <list of docs>
+coreos-dodoc() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	local flags
+	if [[ "${1}" == "-r" ]] ; then
+		flags="-r"
+		shift
+	fi
+
+	[[ "${#}" -lt 1 ]] && die "${0}: at least one file needed"
+
+	insinto "/usr/share/coreos/doc/${P}/"
+	doins $flags $@
+}