Python compilation fails when trying to compile without included zookeeper libs

Hey, I'm trying to compile Mesos against a separate Zookeeper install for packaging. The python setup.py only links against the .libs folder and doesn't check LDFLAGS for a different location for the lib.

Relevant lines
/src/python/setup.py: os.path.join(abs_top_builddir, zookeeper, '.libs', 'libzookeeper_mt.a')