libion: update to latest uapi header

Pull the uapi headers from android-3.10 directly into libion.
No other modules should be directly calling ion kernel
interfaces, so there is no reason to have those interfaces
exposed.

Change-Id: I2d3fef08f6bb381522ecf7bcffea2b8280d5e737
diff --git a/libion/Android.mk b/libion/Android.mk
index ae99ac5..42e6f07 100644
--- a/libion/Android.mk
+++ b/libion/Android.mk
@@ -5,14 +5,14 @@
 LOCAL_MODULE := libion
 LOCAL_MODULE_TAGS := optional
 LOCAL_SHARED_LIBRARIES := liblog
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
-LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include $(LOCAL_PATH)/kernel-headers
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include $(LOCAL_PATH)/kernel-headers
 include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)
 LOCAL_SRC_FILES := ion.c ion_test.c
 LOCAL_MODULE := iontest
 LOCAL_MODULE_TAGS := optional tests
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include $(LOCAL_PATH)/kernel-headers
 LOCAL_SHARED_LIBRARIES := liblog
 include $(BUILD_EXECUTABLE)