ANALYSIS The OS X installer build include several third-party libraries
         which will be installed as shared libs in the framework.
         During the build, setup.py tries to import built extensions to
         catch import problems.  Currently, the import check attempts to
         load the shared libs from their installed location.  If the
         version being built is not installed on the build machine, the
         build fails; if present, the imports are checked against the
         old libraries.  Problems seen with _curses_panel on all builds
         and, for 4-way universal, _curses and readlines.

SOLUTION add the newly built extra libs into the DYLD_LIBRARY_PATH of
         the interpreter during the build phase

APPLIES  2.6, 2.7, 3.0, 3.1