Update two more tests for duplicated canImport diagnostics

Since these duplicated diagnostics only occur under the ParserValidation
testing mode, it won't affect users yet.

Author: DougGregor

test/ClangImporter/can_import_underlying_version_tbd_missing_version.swift

@@ -10,12 +10,14 @@ import Simple
 
 func canImportUnderlyingVersion() {
 #if canImport(Simple, _underlyingVersion: 3.3) // expected-warning {{cannot find user version number for Clang module 'Simple'; version number ignored}}
+  // TODO(ParserValidation): expected-warning@-1 *{{cannot find user version number for Clang module 'Simple'; version number ignored}}
   let a = 1  // expected-warning {{initialization of immutable value 'a' was never used; consider replacing with assignment to '_' or removing it}}
 #endif
 }
 
 func canImportVersion() {
 #if canImport(Simple, _version: 3.3) // expected-warning {{cannot find user version number for Clang module 'Simple'; version number ignored}}
+  // TODO(ParserValidation): expected-warning@-1 *{{cannot find user version number for Clang module 'Simple'; version number ignored}}
   let a = 1  // expected-warning {{initialization of immutable value 'a' was never used; consider replacing with assignment to '_' or removing it}}
 #endif
 }

test/ClangImporter/can_import_version_ignores_missing_tbd_version.swift

@@ -23,14 +23,17 @@ import Simple
 
 func canImportUnderlyingVersion() {
 #if canImport(Simple, _underlyingVersion: 2) // expected-warning {{cannot find user version number for Clang module 'Simple'; version number ignored}}
+  // TODO(ParserValidation): expected-warning@-1 *{{cannot find user version number for Clang module 'Simple'; version number ignored}}
   let a = 1  // expected-warning {{initialization of immutable value 'a' was never used; consider replacing with assignment to '_' or removing it}}
 #endif
 
 #if canImport(Simple, _underlyingVersion: 3) // expected-warning {{cannot find user version number for Clang module 'Simple'; version number ignored}}
+  // TODO(ParserValidation): expected-warning@-1 *{{cannot find user version number for Clang module 'Simple'; version number ignored}}
   let b = 1 // expected-warning {{initialization of immutable value 'b' was never used; consider replacing with assignment to '_' or removing it}}
 #endif
 
 #if canImport(Simple, _underlyingVersion: 4) // expected-warning {{cannot find user version number for Clang module 'Simple'; version number ignored}}
+  // TODO(ParserValidation): expected-warning@-1 *{{cannot find user version number for Clang module 'Simple'; version number ignored}}
   let c = 1 // expected-warning {{initialization of immutable value 'c' was never used; consider replacing with assignment to '_' or removing it}}
 #endif
 

test/Parse/ConditionalCompilation/can_import_version_missing_user_module_version.swift

@@ -16,15 +16,15 @@ func testCanImportNoUserModuleVersion() {
 #if canImport(NoUserModuleVersion, _version: 113.331) // expected-warning {{cannot find user version number for Swift module 'NoUserModuleVersion'; version number ignored}}
   // NOTE: Duplicate warning because the canImport request happens twice when parser
   // validation is enabled.
-  // expected-warning@-3 *{{cannot find user version number for Swift module 'NoUserModuleVersion'; version number ignored}}
+  // TODO(ParserValidation): expected-warning@-3 *{{cannot find user version number for Swift module 'NoUserModuleVersion'; version number ignored}}
   let a = 1 // expected-warning {{initialization of immutable value 'a' was never used; consider replacing with assignment to '_' or removing it}}
 #endif
 
 #if canImport(NoUserModuleVersion, _version: 2) // expected-warning {{cannot find user version number for Swift module 'NoUserModuleVersion'; version number ignored}}
   let b = 1 // expected-warning {{initialization of immutable value 'b' was never used; consider replacing with assignment to '_' or removing it}}
   // NOTE: Duplicate warning because the canImport request happens twice when parser
   // validation is enabled.
-  // expected-warning@-4 *{{cannot find user version number for Swift module 'NoUserModuleVersion'; version number ignored}}
+  // TODO(ParserValidation): expected-warning@-4 *{{cannot find user version number for Swift module 'NoUserModuleVersion'; version number ignored}}
 #endif
 
 }