Skip tests that make assumptions about struct layout that don't hold

    Skip tests that make assumptions about struct layout that don't hold
        on epiphany.  These tests could be fixed by adding padded attributes,
        See:
        http://gcc.gnu.org/ml/gcc-patches/2011-08/msg00006.html
        http://gcc.gnu.org/ml/gcc-patches/2011-09/msg01513.html
        http://gcc.gnu.org/ml/gcc-patches/2011-09/msg01504.html

        * g++.dg/cpp0x/cast.C: Skip for epiphany-*-*.
        * g++.dg/cpp0x/iop.C: Likewise.
        * g++.dg/cpp0x/named_refs.C: Likewise.
        * g++.dg/cpp0x/rv1p.C: Likewise.
        * g++.dg/cpp0x/rv2p.C: Likewise.
        * g++.dg/cpp0x/rv3p.C: Likewise.
        * g++.dg/cpp0x/rv4p.C: Likewise.
        * g++.dg/cpp0x/rv5p.C: Likewise.
        * g++.dg/cpp0x/rv6p.C: Likewise.
        * g++.dg/cpp0x/rv7p.C: Likewise.
        * g++.dg/cpp0x/rv8p.C: Likewise.
        * g++.dg/ext/strncpy-chk1.C: Likewise.
        * gcc.dg/builtin-object-size-10.c: Likewise.
        * gcc.dg/builtin-object-size-11.c: Likewise.
        * gcc.dg/builtin-stringop-chk-1.c: Likewise.
        * gcc.dg/pr25805.c: Likewise.
        * gcc.c-torture/execute/builtins/memcpy-chk.x: New file.
        * gcc.c-torture/execute/builtins/memmove-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/mempcpy-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/memset-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/snprintf-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/sprintf-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/stpcpy-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/strcat-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/strcpy-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/strncat-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/strncpy-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/vsnprintf-chk.x: Likewise.
        * gcc.c-torture/execute/builtins/vsprintf-chk.x: Likewise.
        * gcc.c-torture/execute/zerolen-2.x: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@201268 138bc75d-0d04-0410-961f-82ee72b054a4