android: Remove native-code.cxx on make clean.
android: Remove native-code.cxx on make clean.

Change-Id: Ib287792c754c4b3ee6c8a45749ef9ad7197df84a

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core