Merge libcilkrts from upstream.

libcilkrts/
	* Makefile.am: Merge from upstream, version 2.0.4420.0
	<https://bitbucket.org/intelcilkruntime/intel-cilk-runtime.git>.
	* README: Likewise.
	* configure.ac: Likewise.
	* configure.tgt: Likewise.
	* include/cilk/cilk.h: Likewise.
	* include/cilk/cilk_api.h: Likewise.
	* include/cilk/cilk_api_linux.h: Likewise.
	* include/cilk/cilk_stub.h: Likewise.
	* include/cilk/cilk_undocumented.h: Likewise.
	* include/cilk/common.h: Likewise.
	* include/cilk/holder.h: Likewise.
	* include/cilk/hyperobject_base.h: Likewise.
	* include/cilk/metaprogramming.h: Likewise.
	* include/cilk/reducer.h: Likewise.
	* include/cilk/reducer_file.h: Likewise.
	* include/cilk/reducer_list.h: Likewise.
	* include/cilk/reducer_max.h: Likewise.
	* include/cilk/reducer_min.h: Likewise.
	* include/cilk/reducer_min_max.h: Likewise.
	* include/cilk/reducer_opadd.h: Likewise.
	* include/cilk/reducer_opand.h: Likewise.
	* include/cilk/reducer_opmul.h: Likewise.
	* include/cilk/reducer_opor.h: Likewise.
	* include/cilk/reducer_opxor.h: Likewise.
	* include/cilk/reducer_ostream.h: Likewise.
	* include/cilk/reducer_string.h: Likewise.
	* include/cilktools/cilkscreen.h: Likewise.
	* include/cilktools/cilkview.h: Likewise.
	* include/cilktools/fake_mutex.h: Likewise.
	* include/cilktools/lock_guard.h: Likewise.
	* include/internal/abi.h: Likewise.
	* include/internal/cilk_fake.h: Likewise.
	* include/internal/cilk_version.h: Likewise.
	* include/internal/metacall.h: Likewise.
	* include/internal/rev.mk: Likewise.
	* mk/cilk-version.mk: Likewise.
	* runtime/acknowledgements.dox: Likewise.
	* runtime/bug.cpp: Likewise.
	* runtime/bug.h: Likewise.
	* runtime/c_reducers.c: Likewise.
	* runtime/cilk-abi-cilk-for.cpp: Likewise.
	* runtime/cilk-abi-vla-internal.c: Likewise.
	* runtime/cilk-abi-vla-internal.h: Likewise.
	* runtime/cilk-abi.c: Likewise.
	* runtime/cilk-ittnotify.h: Likewise.
	* runtime/cilk-tbb-interop.h: Likewise.
	* runtime/cilk_api.c: Likewise.
	* runtime/cilk_fiber-unix.cpp: Likewise.
	* runtime/cilk_fiber-unix.h: Likewise.
	* runtime/cilk_fiber.cpp: Likewise.
	* runtime/cilk_fiber.h: Likewise.
	* runtime/cilk_malloc.c: Likewise.
	* runtime/cilk_malloc.h: Likewise.
	* runtime/component.h: Likewise.
	* runtime/config/generic/cilk-abi-vla.c: Likewise.
	* runtime/config/generic/os-fence.h: Likewise.
	* runtime/config/generic/os-unix-sysdep.c: Likewise.
	* runtime/config/x86/cilk-abi-vla.c: Likewise.
	* runtime/config/x86/os-fence.h: Likewise.
	* runtime/config/x86/os-unix-sysdep.c: Likewise.
	* runtime/doxygen-layout.xml: Likewise.
	* runtime/doxygen.cfg: Likewise.
	* runtime/except-gcc.cpp: Likewise.
	* runtime/except-gcc.h: Likewise.
	* runtime/except.h: Likewise.
	* runtime/frame_malloc.c: Likewise.
	* runtime/frame_malloc.h: Likewise.
	* runtime/full_frame.c: Likewise.
	* runtime/full_frame.h: Likewise.
	* runtime/global_state.cpp: Likewise.
	* runtime/global_state.h: Likewise.
	* runtime/jmpbuf.c: Likewise.
	* runtime/jmpbuf.h: Likewise.
	* runtime/linux-symbols.ver: Likewise.
	* runtime/local_state.c: Likewise.
	* runtime/local_state.h: Likewise.
	* runtime/mac-symbols.txt: Likewise.
	* runtime/metacall_impl.c: Likewise.
	* runtime/metacall_impl.h: Likewise.
	* runtime/os-unix.c: Likewise.
	* runtime/os.h: Likewise.
	* runtime/os_mutex-unix.c: Likewise.
	* runtime/os_mutex.h: Likewise.
	* runtime/pedigrees.c: Likewise.
	* runtime/pedigrees.h: Likewise.
	* runtime/record-replay.cpp: Likewise.
	* runtime/record-replay.h: Likewise.
	* runtime/reducer_impl.cpp: Likewise.
	* runtime/reducer_impl.h: Likewise.
	* runtime/rts-common.h: Likewise.
	* runtime/scheduler.c: Likewise.
	* runtime/scheduler.h: Likewise.
	* runtime/signal_node.c: Likewise.
	* runtime/signal_node.h: Likewise.
	* runtime/spin_mutex.c: Likewise.
	* runtime/spin_mutex.h: Likewise.
	* runtime/stats.c: Likewise.
	* runtime/stats.h: Likewise.
	* runtime/sysdep-unix.c: Likewise.
	* runtime/sysdep.h: Likewise.
	* runtime/worker_mutex.c: Likewise.
	* runtime/worker_mutex.h: Likewise.
	* include/cilk/reducer_vector.h: New.
	* runtime/cilk_str_mem.h: New.
	* runtime/config/arm/cilk-abi-vla.c: New.
	* runtime/config/arm/os-fence.h: New.
	* runtime/config/arm/os-unix-sysdep.c: New.
	* runtime/declare-alloca.h: New.
	* runtime/sslib/ignore_handler_s.c: New.
	* runtime/sslib/safe_lib.h: New.
	* runtime/sslib/safe_lib_errno.h: New.
	* runtime/sslib/safe_str_constraint.c: New.
	* runtime/sslib/safe_str_constraint.h: New.
	* runtime/sslib/safe_str_lib.h: New.
	* runtime/sslib/safe_types.h: New.
	* runtime/sslib/safeclib_private.h: New.
	* runtime/sslib/snprintf_s.h: New.
	* runtime/sslib/snprintf_support.c: New.
	* runtime/sslib/strcpy_s.c: New.
	* runtime/sslib/strncpy_s.c: New.
	* runtime/sslib/strnlen_s.c: New.
	* runtime/symbol_test.c: Remove.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

From-SVN: r235870