msm_shared: Add shutdown detect compilation for MSM8996

Add the shutdown detection support for MSM8996. It is used to
support the feature of long press power key.

Change-Id: I714626c1bc06bb4f177d08ef425f2077667bd3a5
diff --git a/platform/msm_shared/rules.mk b/platform/msm_shared/rules.mk
index bffa003..b6647d8 100644
--- a/platform/msm_shared/rules.mk
+++ b/platform/msm_shared/rules.mk
@@ -558,7 +558,8 @@
 			$(LOCAL_DIR)/mipi_dsi.o \
 			$(LOCAL_DIR)/mipi_dsc.o \
 			$(LOCAL_DIR)/mipi_dsi_phy.o \
-			$(LOCAL_DIR)/mipi_dsi_autopll_thulium.o
+			$(LOCAL_DIR)/mipi_dsi_autopll_thulium.o \
+			$(LOCAL_DIR)/shutdown_detect.o
 endif
 
 ifeq ($(ENABLE_UFS_SUPPORT), 1)