python: fix --with-python-binding configure macro

Fix macro syntax error which I introduced in svn r2943.



git-svn-id: https://hamlib.svn.sourceforge.net/svnroot/hamlib/trunk@3040 7ae35d74-ebe9-4afe-98af-79ac388436b8

macros/ac_python_devel.m4

@@ -265,7 +265,7 @@ EOD`
 	if test -z "$PYTHON_EXTRA_LIBS"; then
 	   PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
                 conf = distutils.sysconfig.get_config_var; \
-                conf('LIBS'))"`
+                print (conf('LIBS'))"`
 	fi
 	AC_MSG_RESULT([$PYTHON_EXTRA_LIBS])
 	AC_SUBST(PYTHON_EXTRA_LIBS)