Enable x86-64 stack unwinding test under PNaCl
Enable x86-64 stack unwinding test under PNaCl

This test passes following the recent toolchain revision update.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=1933
TEST=run_unwind_restores_regs_test pnacl_generate_pexe=0

Review URL: https://codereview.chromium.org/18034031

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11741 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client