Add another file to Makefile

src/Makefile.am

diff --git a/src/Makefile.am b/src/Makefile.am
index 90aac4a..fa699f8 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -102,6 +102,7 @@
   google/protobuf/generated_message_table_driven.h               \
   google/protobuf/generated_message_tctable_decl.h               \
   google/protobuf/generated_message_tctable_impl.h               \
+  google/protobuf/generated_message_tctable_impl.inc             \
   google/protobuf/generated_message_util.h                       \
   google/protobuf/has_bits.h                                     \
   google/protobuf/implicit_weak_message.h                        \