-  Add a new target m5.fast (or just fast for short) -  make stuff compile with NDEBUG -  remove the TRACE setup option since it isn't useful anymore
-  Add a new target m5.fast (or just fast for short)
-  make stuff compile with NDEBUG
-  remove the TRACE setup option since it isn't useful anymore

base/statistics.cc:
    Compile with -DNDEBUG

andrewfu0325/gem5-aladdin,haowu4682/gem5,haowu4682/gem5,andrewfu0325/gem5-aladdin,LingxiaoJIA/gem5,LingxiaoJIA/gem5,haowu4682/gem5,LingxiaoJIA/gem5,andrewfu0325/gem5-aladdin,haowu4682/gem5,LingxiaoJIA/gem5,haowu4682/gem5,haowu4682/gem5,LingxiaoJIA/gem5,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,LingxiaoJIA/gem5,haowu4682/gem5,LingxiaoJIA/gem5,haowu4682/gem5,haowu4682/gem5,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin