From Axel: proper CXXFLAGS for win32; per-rule settings are not additive for all  make incarnations.
From Axel:
proper CXXFLAGS for win32; per-rule settings are not additive for all 
make incarnations.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@30921 27541ba8-7e3a-0410-8455-c3a389f83636

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