system/core: remove $(KERNEL_HEADERS) from includes

The kernel headers are already in the include path, and manually
adding them again will break on a multiarch build, where the
kernel headers may be different for each arch.

Change-Id: Ib13d96543f2c97b1b487a46e1748ceb2c5724169
diff --git a/libcutils/Android.mk b/libcutils/Android.mk
index f8dda36..c08a50f 100644
--- a/libcutils/Android.mk
+++ b/libcutils/Android.mk
@@ -124,7 +124,7 @@
     endif # !x86
 endif # !arm
 
-LOCAL_C_INCLUDES := $(libcutils_c_includes) $(KERNEL_HEADERS)
+LOCAL_C_INCLUDES := $(libcutils_c_includes)
 LOCAL_STATIC_LIBRARIES := liblog
 LOCAL_CFLAGS += $(targetSmpFlag)
 include $(BUILD_STATIC_LIBRARY)