fix sphinx Makefile to use same api directory as build_sphinx.py
fix sphinx Makefile to use same api directory as build_sphinx.py

SasView/sasview,SasView/sasview,lewisodriscoll/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview