[C++] Add a way to retrieve stats
diff --git a/Makefile b/Makefile
index 7e523ec..5b0f4f7 100644
--- a/Makefile
+++ b/Makefile
@@ -28,6 +28,7 @@
 	ninja.cc \
 	parser.cc \
 	rule.cc \
+	stats.cc \
 	string_piece.cc \
 	string_pool.cc \
 	stringprintf.cc \