Add missing logging.cc to Android.mk.

Change-Id: Ic1a81a859a21cfa3602e5544b7c53bee3873a3c8

jni/Android.mk

diff --git a/jni/Android.mk b/jni/Android.mk
index 0654580..8677e37 100644
--- a/jni/Android.mk
+++ b/jni/Android.mk
@@ -123,6 +123,7 @@
                    $(CERES_SRC_PATH)/linear_solver.cc \
                    $(CERES_SRC_PATH)/local_parameterization.cc \
                    $(CERES_SRC_PATH)/loss_function.cc \
+                   $(CERES_SRC_PATH)/miniglog/glog/logging.cc \
                    $(CERES_SRC_PATH)/normal_prior.cc \
                    $(CERES_SRC_PATH)/ordering.cc \
                    $(CERES_SRC_PATH)/parmeter_block_ordering.cc \