Add new file name_mapper.cpp to SPIRV-Tools source list.
diff --git a/third_party/Android.mk b/third_party/Android.mk
index d19c025..cad46e2 100644
--- a/third_party/Android.mk
+++ b/third_party/Android.mk
@@ -173,6 +173,7 @@
 		source/disassemble.cpp \
 		source/ext_inst.cpp \
 		source/instruction.cpp \
+		source/name_mapper.cpp \
 		source/opcode.cpp \
 		source/operand.cpp \
 		source/print.cpp \