add patch for eglibc version 2.15

This patch partially reverts an (e)glibc commit
which fixed a memory leak, however introduced lookup
errors in dlopen() with resulting segmentation faults
in certain scenarios.

References:
 - http://comments.gmane.org/gmane.comp.lib.glibc.user/1227
 - http://sourceware.org/ml/libc-alpha/2011-06/msg00006.html

SVN-Revision: 37029