update_engine,rootdev: atomically add librootdev and add update_engine deps

sys-apps/rootdev/rootdev-9999.ebuild

Index: sys-apps/rootdev/rootdev-9999.ebuild
diff --git a/sys-apps/rootdev/rootdev-9999.ebuild b/sys-apps/rootdev/rootdev-9999.ebuild
index 60c7415ec33b879999db11f0c2f475ae2bfdc9d7..2f2d2edf3558fd70f4d46c8c9017397990e2cbb0 100644
--- a/sys-apps/rootdev/rootdev-9999.ebuild
+++ b/sys-apps/rootdev/rootdev-9999.ebuild
@@ -5,10 +5,10 @@ EAPI=2
 
 inherit toolchain-funcs cros-workon
 
-DESCRIPTION="display rootfs device"
+DESCRIPTION="Chrome OS root block device tool/library"
 HOMEPAGE="http://src.chromium.org"
 SRC_URI=""
-LICENSE="GPLv2"
+LICENSE="BSD"
 SLOT="0"
 KEYWORDS="~amd64 ~x86 ~arm"
 IUSE=""
@@ -22,4 +22,11 @@ src_install() {
 	dodir /usr/bin
 	exeinto /usr/bin
 	doexe ${S}/rootdev
+
+	dodir /usr/lib
+	dolib.so librootdev.so*
+
+	dodir /usr/include/rootdev
+	insinto /usr/include/rootdev
+	doins rootdev.h
 }