* debug_counter.c (debug_counter_names): stringize debug counter names by preprocessor. * debug_counter.h (RB_DEBUG_COUNTER): define counter names outside the include guard, to expand multiple times. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57826 b2dd03c8-39d4-4d8f-98ff-823fe69b080e