msm8974: Enable I2C using BLSP block

Change-Id: I75cc87ee6cad38b8594133351db4b21277dd4f73
diff --git a/app/tests/rules.mk b/app/tests/rules.mk
index 8f78eed..c8578ec 100644
--- a/app/tests/rules.mk
+++ b/app/tests/rules.mk
@@ -5,4 +5,5 @@
 OBJS += \
 	$(LOCAL_DIR)/tests.o \
 	$(LOCAL_DIR)/thread_tests.o \
-	$(LOCAL_DIR)/printf_tests.o
+	$(LOCAL_DIR)/printf_tests.o \
+	$(LOCAL_DIR)/i2c_tests.o