For qt3, append to LD_LIBRARY_PATH, do not nuke it (#2862)

* libmonitor does not exist at
http://libmonitor.googlecode.com/svn/trunk/

Change location to HPCToolkit version at github. Specify the hash corresponding
to the 20130218 version.

* When xcb is version 1.11, patch the configure file so it doesn't trip on
pthread-stubs and xau.

* Add os.getcwd()/lib to LD_LIBRARY_PATH, instead of nuking
existing LD_LIBRARY_PATH.