Debug stub: fix for arm, where we don't have breakpoints
Debug stub: fix for arm, where we don't have breakpoints

Nice fact to detect only at run-time :)

Fix for broken revision 8329.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=1730
TEST=run_gdb_rsp_tests

Review URL: https://chromiumcodereview.appspot.com/10155007

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@8331 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client