Fix build error while were doing incremental build

Build command: make telephony-common

Build error info as below:
make: *** No rule to make target `frameworks/opt/telephony/
src/java/com/android/internal/telephony/AdnRecord.aidl',
needed by `out/target/common/obj/JAVA_LIBRARIES/
telephony-common_intermediates/src/src/java/com/android/
internal/telephony/IIccPhoneBook.java'.  Stop.

Change-Id: I028a3d7ed94c63849bbbc5063142037f1d1ac7bf
Signed-off-by: Roger Chen <cxr514033970@gmail.com>
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 8b3a29d..f4475ef 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -40,6 +40,7 @@
 
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/telephony-common_intermediates)
 
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST