contributors: add Galaxy R maintainers

Change-Id: I474068e4e160e7ce01667c91c9cc35d06b4b3ae5
diff --git a/CONTRIBUTORS.mkdn b/CONTRIBUTORS.mkdn
index c174e74..2aecada 100644
--- a/CONTRIBUTORS.mkdn
+++ b/CONTRIBUTORS.mkdn
@@ -29,6 +29,7 @@
 * __Samsung Galaxy Note II LTE (GT-N7105 / SGH-I317 / SGH-T889):__ codeworkx, madmack
 * __Samsung Galaxy Note II LTE (SCH-I605 / SPH-L900):__ sbrissen
 * __Samsung Galaxy Note 10.1 (GT-N80XX):__ Entropy512, Espenfjo
+* __Samsung Galaxy R (GT-I9103):__ Adam77Root, Epsylon3
 * __Samsung Galaxy S Blaze 4G (SGH-T769):__ UberPinguin
 * __Samsung Galaxy S (GT-I9000):__ pawitp
 * __Samsung Galaxy S (GT-I9000B):__ helvio88