[libc++][C++03] Make __libcpp_verbose_abort noexcept and fix the test for it

Author: philnik777

libcxx/include/__cxx03/__verbose_abort

@@ -21,7 +21,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 // This function should never be called directly from the code -- it should only be called through
 // the _LIBCPP_VERBOSE_ABORT macro.
 _LIBCPP_NORETURN _LIBCPP_AVAILABILITY_VERBOSE_ABORT _LIBCPP_OVERRIDABLE_FUNC_VIS
-_LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 2) void __libcpp_verbose_abort(const char* __format, ...);
+_LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 2) void __libcpp_verbose_abort(const char* __format, ...) _NOEXCEPT;
 
 // _LIBCPP_VERBOSE_ABORT(format, args...)
 //

libcxx/test/libcxx-03/assertions/customize_verbose_abort.link-time.pass.cpp

@@ -12,9 +12,7 @@
 // failures when back-deploying.
 // XFAIL: availability-verbose_abort-missing
 
-// XFAIL: FROZEN-CXX03-HEADERS-FIXME
-
-#include <__verbose_abort>
+#include <__cxx03/__verbose_abort>
 #include <cstdlib>
 
 void std::__libcpp_verbose_abort(char const*, ...) _NOEXCEPT { std::exit(EXIT_SUCCESS); }