Change python install path to the platform-specific directory

m4/ax_python_devel.m4

@@ -253,7 +253,7 @@ EOD`
 	AC_MSG_CHECKING([for Python site-packages path])
 	if test -z "$PYTHON_SITE_PKG"; then
 		PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \
-			print (distutils.sysconfig.get_python_lib(0,0));"`
+			print (distutils.sysconfig.get_python_lib(1,0));"`
 	fi
 	AC_MSG_RESULT([$PYTHON_SITE_PKG])
 	AC_SUBST([PYTHON_SITE_PKG])