scons: Separate swig environment so we can have different flags. Swig code isn't quite perfect, so let's not turn on all of the warnings.
scons: Separate swig environment so we can have different flags.
Swig code isn't quite perfect, so let's not turn on all of the warnings.

LingxiaoJIA/gem5,haowu4682/gem5,haowu4682/gem5,haowu4682/gem5,LingxiaoJIA/gem5,LingxiaoJIA/gem5,LingxiaoJIA/gem5,haowu4682/gem5,haowu4682/gem5,haowu4682/gem5,haowu4682/gem5,LingxiaoJIA/gem5,haowu4682/gem5,LingxiaoJIA/gem5,haowu4682/gem5,LingxiaoJIA/gem5