Unsandboxed IRT: Add missing "const" to top-level IRT interface structs
Unsandboxed IRT: Add missing "const" to top-level IRT interface structs

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3699
TEST=run_hello_world_test_irt pnacl_unsandboxed=1

Review URL: https://codereview.chromium.org/26601011

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@12252 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client