[tcmalloc] fix hooks for tcmalloc
[tcmalloc] fix hooks for tcmalloc

pbrunet/pythran,pombredanne/pythran,pbrunet/pythran,hainm/pythran,pombredanne/pythran,artas360/pythran,artas360/pythran,hainm/pythran,hainm/pythran,pbrunet/pythran,artas360/pythran,serge-sans-paille/pythran,pombredanne/pythran,serge-sans-paille/pythran