Add missing files to Android.mk

Change-Id: Ibdf577c592bcde0fe5c2ce343ed8e9028b82af8f

jni/Android.mk

diff --git a/jni/Android.mk b/jni/Android.mk
index deedd19..1797949 100644
--- a/jni/Android.mk
+++ b/jni/Android.mk
@@ -126,6 +126,8 @@
                    $(CERES_SRC_PATH)/dense_sparse_matrix.cc \
                    $(CERES_SRC_PATH)/detect_structure.cc \
                    $(CERES_SRC_PATH)/dogleg_strategy.cc \
+                   $(CERES_SRC_PATH)/dynamic_compressed_row_jacobian_writer.cc \
+                   $(CERES_SRC_PATH)/dynamic_compressed_row_sparse_matrix.cc \
                    $(CERES_SRC_PATH)/evaluator.cc \
                    $(CERES_SRC_PATH)/file.cc \
                    $(CERES_SRC_PATH)/gradient_checking_cost_function.cc \