(LibbacktraceSymbolizer::Demangle): New declaration.
	* sanitizer_common/sanitizer_symbolizer_posix_libcdep.cc
	(POSIXSymbolizer::Demangle): Use libbacktrace_symbolizer_'s Demangle
	method if possible.
	* sanitizer_common/sanitizer_symbolizer_libbacktrace.cc: Include
	"demangle.h" if SANITIZE_CP_DEMANGLE is defined.
	(struct CplusV3DemangleData): New type.
	(CplusV3DemangleCallback, CplusV3Demangle): New functions.
	(SymbolizeCodePCInfoCallback, SymbolizeCodeCallback,
	SymbolizeDataCallback): Use CplusV3Demangle.
	* sanitizer_common/Makefile.am (AM_CXXFLAGS): Add
	-DSANITIZE_CP_DEMANGLE and -I $(top_srcdir)/../include.
	* libbacktrace/backtrace-rename.h (cplus_demangle_builtin_types,
	cplus_demangle_fill_ctor, cplus_demangle_fill_dtor,
	cplus_demangle_fill_extended_operator, cplus_demangle_fill_name,
	cplus_demangle_init_info, cplus_demangle_mangled_name,
	cplus_demangle_operators, cplus_demangle_print,
	cplus_demangle_print_callback, cplus_demangle_type, cplus_demangle_v3,
	cplus_demangle_v3_callback, is_gnu_v3_mangled_ctor,
	is_gnu_v3_mangled_dtor, java_demangle_v3, java_demangle_v3_callback):
	Define.
	(__asan_internal_memcmp, __asan_internal_strncmp): New prototypes.
	(memcmp, strncmp): Redefine.
	* libbacktrace/Makefile.am (libsanitizer_libbacktrace_la_SOURCES): Add
	../../libiberty/cp-demangle.c.
	* libbacktrace/bridge.cc (__asan_internal_memcmp,
	__asan_internal_strncmp): New functions.
	* sanitizer_common/Makefile.in: Regenerated.
	* libbacktrace/Makefile.in: Regenerated.
	* configure: Regenerated.
	* configure.ac: Regenerated.
	* config.h.in: Regenerated.

From-SVN: r206477