msm_shared: Enable shutdown detect compilation for MSM8226

Add the shutdown detection function needed for MSM8226.
It is used to support the feature of long press power key.

Change-Id: Id0a07f46cd9ae1bc9840d9e92292595143f6f7cf
diff --git a/platform/msm_shared/rules.mk b/platform/msm_shared/rules.mk
index 06169a5..d3b994f 100755
--- a/platform/msm_shared/rules.mk
+++ b/platform/msm_shared/rules.mk
@@ -133,7 +133,8 @@
             $(LOCAL_DIR)/crypto5_wrapper.o \
 			$(LOCAL_DIR)/dev_tree.o \
 			$(LOCAL_DIR)/gpio.o \
-			$(LOCAL_DIR)/dload_util.o
+			$(LOCAL_DIR)/dload_util.o \
+			$(LOCAL_DIR)/shutdown_detect.o
 endif
 
 ifeq ($(PLATFORM),mpq8092)