Add templated files to .gitignore

Author: amomchilov

.gitignore

@@ -19,4 +19,10 @@ lib/**/*.bundle
 lib/**/*.so
 lib/**/*.dll
 doc/
+
+include/rbs/constants.h
+include/rbs/ruby_objs.h
+src/constants.c
+src/ruby_objs.c
+
 **/*.gem