NaCl: Update revision in DEPS, r6424 -> r6447
NaCl: Update revision in DEPS, r6424 -> r6447

This pulls in the following Native Client changes:

r6425: (jvoung) Add tests for pnacl coordinator's error handling and tweak the error messages
r6426: (jvoung) Fix a bug in llc size tracker that made it only track the size of the first arch in the argument list.
r6427: (pdox) Add -r (-relocatable) support to pnacl-ld.
r6428: (ncbray) Defensively initialize NaClSrpcChannel data structures with NULL pointers.
r6429: (mseaborn) Ensure nacl_thread[] entry is not left set if thread creation fails
r6430: (khim) Bump DEPS to pull GLIBC with .so version != 6.
r6431: (eugenis) Update libc sonames in valgrind interceptors.
r6432: (mseaborn) x86-32 sandbox: Factor out duplicated code in nacl_syscall_32.S
r6433: (mark) Set mac_real_dsym to 1 for ppGoogleNaClPluginChrome.plugin in Breakpad-enabled
r6434: (dschuff) Update Chrome DEPS in NaCl
r6435: (kschimpf) Make 'ncval' and 'ncval_annotate' command line tools (for all platforms)...
r6436: (ncbray) nacl_integration: clean up SCons invocations
r6437: (kschimpf) Separate the (partial) decoder of the x86_32 validator into a separate library.
r6438: (mcgrathr) Get rid of IRT's private sbrk
r6439: (jvoung) Disable the bad_pexe_undefined_syms in pnacl_bad_test.html until
r6440: (krasin) service_runtime: remove unused max_data_alloc field from NaClApp.
r6441: (kschimpf) Generates a set of decoder tables targeted to the needs of the
r6442: (jvoung) Fix typo in toolchain perf graph format. Otherwise we can't track
r6444: (krasin) service_runtime: remove unused NaClClosure and nacl_closure.c.
r6445: (thestig) Cleanup - base/scoped_ptr.h -> base/memory/scoped_ptr.h.
r6446: (dschuff) Loosen perf regression bounds on Linux MakeDynText time
r6447: (mcgrathr) Make chrome_browser_tests work with irt=0 again

BUG=none
TEST=nacl_integration


Review URL: http://codereview.chromium.org/7655007

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@97172 0039d316-1c4b-4281-b951-d872f2087c98

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