bench(WIP): add the size command after the bench mark

- append the code size mesurement after the cycle benchmark
- add the @$(W) size $(BUILD_DIR)/*mlkem512.a after each test/build/mlkemXXX/bin/bench_mlkemXXX
- need more disscusion for the ouput format

Signed-off-by: willieyz <willie.zhao@chelpis.com>

Author: willieyz

Makefile

@@ -94,10 +94,13 @@ bench: bench_512 bench_768 bench_1024
 
 run_bench_512: bench_512
 	$(W) $(MLKEM512_DIR)/bin/bench_mlkem512
+	$(Q)$(SIZE) $(BUILD_DIR)/*mlkem512.a
 run_bench_768: bench_768
 	$(W) $(MLKEM768_DIR)/bin/bench_mlkem768
+	$(Q)$(SIZE) $(BUILD_DIR)/*mlkem768.a
 run_bench_1024: bench_1024
 	$(W) $(MLKEM1024_DIR)/bin/bench_mlkem1024
+	$(Q)$(SIZE) $(BUILD_DIR)/*mlkem1024.a
 
 # Use .WAIT to prevent parallel execution when -j is passed
 run_bench: \