Summary:
Added the configure script variable PY_PREFIX which serves the same purpose
for Python as --prefix does for C/C++. We chose to do this because Python
has different conventions for where to install libraries.
Reviewed By: mcslee
Test Plan:
Full clean builds and installs of Thrift from the Thrift root,
with and without PY_PREFIX. Watched output of make install.
Ran configure from lib/py without PY_PREFIX, with PY_PREFIX and with
PY_PREFIX in the environment. Checked config.status for each.
Revert Plan: okay
git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665248 13f79535-47bb-0310-9956-ffa450edef68