rild.c: Use log/log.h instead of utils/Log.h

This doesn't use libutils, so it shouldn't be using the libutils
headers. It doesn't use anything unique to utils/Log.h anyways.

It also shouldn't be using any headers from TARGET_OUT_HEADERS (aka
LOCAL_COPY_HEADERS)

Test: m -j rild
Change-Id: I64ef29cdc17a32e013bccfa799cb9c125386cf50
diff --git a/rild/Android.mk b/rild/Android.mk
index 5c7800d..fe81d22 100644
--- a/rild/Android.mk
+++ b/rild/Android.mk
@@ -27,9 +27,7 @@
 LOCAL_MODULE_RELATIVE_PATH := hw
 LOCAL_PROPRIETARY_MODULE := true
 LOCAL_MODULE:= rild
-LOCAL_MODULE_TAGS := optional
 LOCAL_INIT_RC := rild.rc
 
-LOCAL_C_INCLUDES += $(TARGET_OUT_HEADERS)/libril
+include $(BUILD_EXECUTABLE)
 
-include $(BUILD_EXECUTABLE)
\ No newline at end of file