Move bigram_dictionary

Change-Id: I2c243ac75bc02b912f6b0fabedd372148adf8076
diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index f56223f..1518dad 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -46,7 +46,6 @@
     jni_common.cpp
 
 LATIN_IME_CORE_SRC_FILES := \
-    bigram_dictionary.cpp \
     correction.cpp \
     dic_traverse_wrapper.cpp \
     unigram_dictionary.cpp \
@@ -57,6 +56,7 @@
         dic_node_utils.cpp \
         dic_nodes_cache.cpp) \
     $(addprefix suggest/core/dictionary/, \
+        bigram_dictionary.cpp \
         binary_dictionary_format.cpp \
         byte_array_utils.cpp \
         dictionary.cpp \