[libc++] Fix too stringent availability markup for bad_optional_access

The availability markup for bad_optional_access marked it as being added
in MacOS 10.14 and aligned releases, however it appears to have been added
in Mac OS 10.13 and aligned releases.

libcxx/include/__config

@@ -1392,10 +1392,10 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
      __attribute__((availability(tvos,strict,introduced=10.0)))                \
      __attribute__((availability(watchos,strict,introduced=3.0)))
 #  define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS                             \
-     __attribute__((availability(macosx,strict,introduced=10.14)))             \
-     __attribute__((availability(ios,strict,introduced=12.0)))                 \
-     __attribute__((availability(tvos,strict,introduced=12.0)))                \
-     __attribute__((availability(watchos,strict,introduced=5.0)))
+     __attribute__((availability(macosx,strict,introduced=10.13)))             \
+     __attribute__((availability(ios,strict,introduced=11.0)))                 \
+     __attribute__((availability(tvos,strict,introduced=11.0)))                \
+     __attribute__((availability(watchos,strict,introduced=4.0)))
 #  define _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS                              \
      _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
 #  define _LIBCPP_AVAILABILITY_BAD_ANY_CAST                                    \

libcxx/utils/libcxx/test/config.py

@@ -857,8 +857,8 @@ def configure_deployment(self):
                 self.config.available_features.add('dylib-has-no-shared_mutex')
                 self.lit_config.note("shared_mutex is not supported by the deployment target")
             # Throwing bad_optional_access, bad_variant_access and bad_any_cast is
-            # supported starting in macosx10.14.
-            if name == 'macosx' and version in ('10.%s' % v for v in range(9, 14)):
+            # supported starting in macosx10.13.
+            if name == 'macosx' and version in ('10.%s' % v for v in range(9, 13)):
                 self.config.available_features.add('dylib-has-no-bad_optional_access')
                 self.lit_config.note("throwing bad_optional_access is not supported by the deployment target")