init: Enable LOCAL_DETECT_INTEGER_OVERFLOWS

Call abort() if an integer overflow or underflow occurs.
See https://android-review.googlesource.com/154831

Change-Id: Icb6bdef55a5899144351b56d683f34f5da32a88d
diff --git a/init/Android.mk b/init/Android.mk
index 45b002d..9aeaeab 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -30,6 +30,8 @@
 
 LOCAL_STATIC_LIBRARIES := libbase
 LOCAL_MODULE := libinit
+
+LOCAL_DETECT_INTEGER_OVERFLOWS := true
 LOCAL_CLANG := true
 include $(BUILD_STATIC_LIBRARY)
 
@@ -77,6 +79,7 @@
     ln -sf ../init $(TARGET_ROOT_OUT)/sbin/ueventd; \
     ln -sf ../init $(TARGET_ROOT_OUT)/sbin/watchdogd
 
+LOCAL_DETECT_INTEGER_OVERFLOWS := true
 LOCAL_CLANG := true
 include $(BUILD_EXECUTABLE)
 
@@ -94,5 +97,6 @@
     libbase \
 
 LOCAL_STATIC_LIBRARIES := libinit
+LOCAL_DETECT_INTEGER_OVERFLOWS := true
 LOCAL_CLANG := true
 include $(BUILD_NATIVE_TEST)