lvm2: split libraries to a different package

lvm2 package provides some user-space tools, but also some dynamic
libraries: libdevmapper, libdevmapper-event, etc.

This commit allows to package the LVM2 libraries in a different package
than the LVM2 user-space tools. This way other user-space tools (e.g.
cryptsetup) that runtime depends on the LVM2 libs can only add that libs
package to the rootfs, instead of the whole LVM2 utilities.

Signed-off-by: Javier Viguera <javier.viguera@digi.com>

meta-digi-dey/recipes-support/lvm2/lvm2_%.bbappend

@@ -0,0 +1,6 @@
+# Copyright (C) 2016 Digi International.
+
+# Split libraries into a different package
+PACKAGES =+ "lib${PN}"
+
+FILES_lib${PN} = "${libdir}/lib*.so.*"