Use list of string rather than string for CXXFLAGS in SCons build.
Use list of string rather than string for CXXFLAGS in SCons build.

git-svn-id: 160a54a163977f6af02886177ce073523b05404e@237 48d1c4d4-5707-0410-b125-91f9528d8bec

pjgrenyer/aeryn