Change pnacl llvm triple to use nacl instead of linux (inside plugin).

Inside driver change: http://codereview.chromium.org/7737032/

BUG= http://code.google.com/p/nativeclient/issues/detail?id=1554
TEST= build chrome, host files for "run_pnacl_example_browser_test" and "run_pnacl_bad_browser_test" from a nacl repo (since there is no pnacl toolchain downloaded in chrome repo) and load the test.

Review URL: http://codereview.chromium.org/7828088

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@99820 0039d316-1c4b-4281-b951-d872f2087c98

ppapi/native_client/src/trusted/plugin/pnacl_coordinator.cc

-// Copyright (c) 2011 The Native Client Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -266,17 +266,17 @@ void WINAPI DoTranslateThread(void* arg) {
   // probably is PIC vs non-PIC and micro-arch specification.
   const char* llc_args_x8632[] = { "-march=x86",
                                    "-mcpu=pentium4",
-                                   "-mtriple=i686-none-linux-gnu",
+                                   "-mtriple=i686-none-nacl-gnu",
                                    "-asm-verbose=false",
                                    "-filetype=obj" };
   const char* llc_args_x8664[] = { "-march=x86-64",
                                    "-mcpu=core2",
-                                   "-mtriple=x86_64-none-linux-gnu",
+                                   "-mtriple=x86_64-none-nacl-gnu",
                                    "-asm-verbose=false",
                                    "-filetype=obj" };
   const char* llc_args_arm[] = { "-march=arm",
                                  "-mcpu=cortex-a8",
-                                 "-mtriple=armv7a-none-linux-gnueabi",
+                                 "-mtriple=armv7a-none-nacl-gnueabi",
                                  "-asm-verbose=false",
                                  "-filetype=obj",
                                  "-arm-reserve-r9",