re PR libstdc++/14026 (std::uncaught_exception is true although there are no uncaught exceptions (rethrow, ghost exception))

        PR libstdc++/14026
        * libsupc++/eh_catch.cc (__cxa_begin_catch): Don't adjust
        uncaughtExceptions during nested catch rethrow.
        * testsuite/18_support/14026.cc: New.

From-SVN: r77492