fix_hardcoded_python_sitelibs_in_configure.ac

to avoid those warnings.

DEBUG: checking for python version... 2.7
DEBUG: checking for python platform... linux2
DEBUG: checking for python script directory... ${prefix}/lib/python2.7/site-packages
DEBUG: checking for python extension module directory... ${exec_prefix}/lib64/python2.7/site-packages
DEBUG: checking for headers required to compile python extensions... found
DEBUG: sed: can't read /usr/lib/python2.7/config/Makefile: No such file or directory
DEBUG: sed: can't read /usr/lib/python2.7/config/Makefile: No such file or directory