Added tests for SEA IR intermediate representation.

Change-Id: Ibc55fc3d1f6f753381a9d508d250944c2c45531d
diff --git a/build/Android.gtest.mk b/build/Android.gtest.mk
index 4d1e18d..ac3b821 100644
--- a/build/Android.gtest.mk
+++ b/build/Android.gtest.mk
@@ -62,7 +62,8 @@
 TEST_COMMON_SRC_FILES += \
 	compiler/utils/scoped_hashtable_test.cc \
 	compiler/sea_ir/types/type_data_test.cc \
-	compiler/sea_ir/types/type_inference_visitor_test.cc
+	compiler/sea_ir/types/type_inference_visitor_test.cc \
+	compiler/sea_ir/ir/regions_test.cc
 endif
 
 TEST_TARGET_SRC_FILES := \