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/project/msm8996.mk b/project/msm8996.mk
index aefc7c3..24f5887 100644
--- a/project/msm8996.mk
+++ b/project/msm8996.mk
@@ -41,6 +41,9 @@
 DEFINES += USE_RPMB_FOR_DEVINFO=1
 DEFINES += ENABLE_WBC=1
 
+#Enable the feature of long press power on
+DEFINES += LONG_PRESS_POWER_ON=1
+
 #Disable thumb mode
 ENABLE_THUMB := false