Use a simpler check for Python's libs that returns an actual linker
invocation (e.g. -lpython2.6) instead of the .so file. This fixes the
case with forced as-needed where the .so gets re-ordered to the front
during link.

--- configure.in.~1~	2010-12-08 03:20:38.000000000 +0100
+++ configure.in	2010-12-15 19:10:11.716940123 +0100
@@ -280,12 +280,7 @@
 AC_CHECK_PROG(PYTHON27, python2.7, [yes])
 # Python headers
 AC_MSG_CHECKING(for Python libraries)
-PYTHON_LIBS=[$(python -c "from distutils import sysconfig
-import os 
-cfg=sysconfig.get_config_vars()
-lib = os.path.join(cfg['LIBDIR'], cfg['LDLIBRARY'])
-if os.path.exists(lib):
-    print lib")]
+PYTHON_LIBS=[$(python -c 'import sys; print("-lpython%s.%s" % sys.version_info[:2])')]
 PYTHON_CFLAGS=[$(python -c "from distutils import sysconfig
 print sysconfig.get_python_inc()")]
 PYTHON_CFLAGS="-I$PYTHON_CFLAGS"