Move non compiled libraries from /lib/rc to /libexec/rc

OpenRC version is now stored as plaintext in /libexec/rc/version

Plugins (cursplash, splashutils) will have to be re-compiled to pickup
the new directories. State data needs to be moved from /lib/rc/init.d
to /libexec/rc/init.d as well.

Makefile

@@ -26,7 +26,9 @@ include ${MK}/sys.mk
 include ${MK}/os.mk
 include ${MK}/subdir.mk
 include ${MK}/dist.mk
+include ${MK}/git.mk
 
 _installafter:
-	${INSTALL} -d ${DESTDIR}/${PREFIX}/${RC_LIB}/init.d
-	${INSTALL} -d ${DESTDIR}/${PREFIX}/${RC_LIB}/tmp
+	${INSTALL} -d ${DESTDIR}/${LIBEXECDIR}/init.d
+	${INSTALL} -d ${DESTDIR}/${LIBEXECDIR}/tmp
+	${ECHO} "${VERSION}${GITVER}" > ${DESTDIR}/${LIBEXECDIR}/version