NaCl: Update revision in DEPS, r7664 -> r7720

NaCl: Update revision in DEPS, r7664 -> r7720

This pulls in the following Native Client changes:

r7665: (elijahtaylor) Fix dlopen hang on main thread.
r7666: (bsy) fixed range checking error that prevented objects to be at the end of addr sp
r7667: (jvoung) Pass along -pthread option in pnacl driver to define _REENTRANT, link in libpthread.
r7668: (ncbray) Change the x86-64 decoder to store jump offsets rather than target addresses.
r7669: (kschimpf) Clean up code handling indirect jumps in the x86-64 validator.
r7670: (dschuff) Use pexe+translate steps rather than bc+clang to compile torture tests
r7671: (bsy) syscall and irt hooks to expose the clock_getres and clock_gettime functionality
r7672: (ncbray) Strengthen another x86-64 validator test.
r7673: (bsy) update copyright headers missed in r7671
r7674: (kschimpf) Repair damage to generated pre/post conditions for testing of the x86-64
r7675: (bradnelson) Adding exception_tests test suite.
r7676: (ncbray) Change the x86-64 validator to work in offsets rather than addresses.
r7677: (ncbray) Force expression nodes in the x86-64 validator to have specified sizes.
r7678: (dschuff) Make JIT build work again
r7679: (pdox) run.py:
r7680: (mcgrathr) Update toolchain rev
r7682: (jvoung) Add support for generating nmfs for pnacl pexes with glibc (vs pnacl nexes).
r7683: (elijahtaylor) Add irt_core.nexe to SDK install_bin target
r7684: (jvoung) update llvm rev for data-layout revert: http://codereview.chromium.org/9290056/
r7685: (jvoung) Address some comments from old CLs:
r7686: (mseaborn) Exception handling: Test multiple exception stack alignments
r7687: (pdox) PNaCl: Bitcode linker modification. Handle symbols from .pso files
r7688: (ncbray) Simplify the x86-64 validator's internal representation of constants.
r7689: (ncbray) Change DEBUG printing in the validator to print offsets instead of addresses.
r7690: (dschuff) new testsuite passes/failures
r7691: (bsy) libnacl changes to enable clock_get{res,time}.  moves timespec defn.
r7692: (pdox) PNaCl: Fix typo in driver (env.append instead of env.set).
r7693: (mseaborn) download_toolchains: Get tarball hashes by downloading '.sha1hash' files
r7694: (kschimpf) Add ULDI-disable flag for projects that use .asm files
r7695: (pdox) PNaCl driver fixes:
r7696: (pdox) Augment libnosys w/ raise, execle, execvp, execl, execv, execlp.
r7697: (ncbray) Prevent nacl_dyncode_create from marking memory as used when validation fails.
r7698: (pdox) Add -ansi to pnacl driver.
r7699: (bradchen) Enable platform_qual_test on Win64. Add blacklist unit tests.
r7700: (robertm) Update qemu to v1.0.
r7701: (sehr) A slightly more visual liveness indication during translation.
r7702: (dschuff) Run LLVM toolchain tests with qemu 1.0
r7703: (pdox) Roll Chrome DEPS in NaCl
r7705: (bsy) revert 7703, which broke mac10.6-newlib-dbg-clang gyp due to clang warnings
r7707: (bsy) enable direct syscalls for clock_get{res,time}. used for irt=0 (tests).
r7708: (mseaborn) Windows: Wait for SuspendThread() to take effect using GetThreadContext()
r7709: (dschuff) Test sel_universal streaming interface by sending bitcode data over SRPC
r7710: (mseaborn) Exception handling: Add tests to check that invalid handlers are rejected
r7711: (mseaborn) Exception handling: Test the exception handler's %esp exactly
r7712: (ncbray) Ensure super instructions are marked during dynamic code modification.
r7713: (noelallen) Add NACL_SECURITY_DISABLE environment variable to allow PPAPI developers
r7714: (bradnelson) Add OSX hardware exception handling to sel_ldr.
r7715: (dschuff) Revert "Run LLVM toolchain tests with qemu 1.0"
r7716: (pdox) Roll toolchain DEPS to 7712.
r7718: (pdox) Revert PNaCl DEPS roll (partial revert of r7716)
r7720: (mcgrathr) Make IRT load failure fatal under Chrome

BUG=none
TEST=nacl_integration

Review URL: https://chromiumcodereview.appspot.com/9309040

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@120104 0039d316-1c4b-4281-b951-d872f2087c98