Removed useless libs for CXXFLAGS, added python enabled to true when bui...

...lt on its own
$(CWD) is defined everytime include_sub_make is called. (thus before the types/types.mk script) in the directory given to include_sub_make (parameter 2).

Just as proof of it working with our current infrastructure (I've added logging in types.mk) : 
jmbouchard@dev:~/workspace/rtb-test/customers/answermedia$ nice make -kj16 compile
LIB is build/x86_64/bin
CWD is soa/types