sys-apps/smc-sum-driver: rev bump to force rebuild due to eclass fix

Due to a problem in linux-mod eclass, kernel module wasn't
installed properly (see commit 62b702e95d6 for details).

Package-Manager: Portage-2.3.49, Repoman-2.3.10

diff --git a/sys-apps/smc-sum-driver/smc-sum-driver-1.6.0.20151201-r1.ebuild b/sys-apps/smc-sum-driver/smc-sum-driver-1.6.0.20151201-r2.ebuild
similarity index 100%
rename from sys-apps/smc-sum-driver/smc-sum-driver-1.6.0.20151201-r1.ebuild
rename to sys-apps/smc-sum-driver/smc-sum-driver-1.6.0.20151201-r2.ebuild