Update FIXMEs on diagnostic definitions that will be obsoleted in the future.

Author: tshortli

include/swift/AST/DiagnosticsParse.def

@@ -1559,11 +1559,11 @@ ERROR(attr_availability_duplicate,none,
       (StringRef, StringRef))
 
 // originallyDefinedIn
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 ERROR(originally_defined_in_missing_rparen,none,
       "expected ')' in @_originallyDefinedIn argument list", ())
 
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 ERROR(originally_defined_in_unrecognized_platform,none,
       "unrecognized platform name in @_originallyDefinedIn argument list", ())
 
@@ -1578,19 +1578,19 @@ ERROR(originally_defined_in_need_original_module_name,none,
 ERROR(originally_defined_in_need_nonempty_module_name,none,
       "original module name cannot be empty in @_originallyDefinedIn", ())
 
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 ERROR(originally_defined_in_need_platform_version,none,
      "expected at least one platform version in @_originallyDefinedIn", ())
 
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 WARNING(originally_defined_in_major_minor_only,none,
         "@_originallyDefinedIn only uses major and minor version number", ())
 
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 WARNING(originally_defined_in_missing_platform_name,none,
         "* as platform name has no effect", ())
 
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 WARNING(originally_defined_in_swift_version, none,
         "Swift language version checks has no effect "
         "in @_originallyDefinedIn", ())

include/swift/AST/DiagnosticsSema.def

@@ -1597,21 +1597,21 @@ WARNING(option_set_zero_constant,none,
 NOTE(option_set_empty_set_init,none,
      "use [] to silence this warning", ())
 
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 ERROR(originally_defined_in_dupe_platform,none,
       "duplicate version number for platform %0", (StringRef))
 
 ERROR(originally_definedin_topleve_decl,none,
       "@%0 is only applicable to top-level decl", (StringRef))
 
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 ERROR(originally_definedin_need_available,none,
       "need @available attribute for @%0", (StringRef))
 
 ERROR(originally_definedin_must_not_before_available_version,none,
       "symbols are moved to the current module before they were available in the OSs", (StringRef))
 
-// FIXME: Refactor to share between attributes
+// FIXME(backDeploy): Refactor to share with back deployment attr
 WARNING(originally_defined_in_on_non_public,
        none, "@%0 does not have any effect on "
        "%select{private|fileprivate|internal|%error|%error}1 declarations",