Use TARGET_BOARD_INFO_FILE to locate board-info.txt

So board-info.txt can be inherited from the parent device.

Change-Id: I5d99a2483b9a325e475f3c602d9e0f5d2b95e80c
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 44cb05e..70a053f 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -94,6 +94,8 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libstagefright_intermediates)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/libstagefright_omx_intermediates)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/SHARED_LIBRARIES/librtp_jni_intermediates)
+
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/android-info.txt)
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************