Remove -lppapi hack for nacl_irt_test
Remove -lppapi hack for nacl_irt_test

Now that the default linking layout is compatible with IRT loading,
we don't need to link all tests with -lppapi to run them under IRT.

BUG= cleanup
TEST= trybots

R=ncbray@google.com,mseaborn@chromium.org

Review URL: http://codereview.chromium.org/7572008

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@6309 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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,sbc100/native_client,sbc100/native_client