Merge pull request swiftlang#380 from apple/update-project-precommit-check

Update project_precommit_check check to swiftc version from Xcode 11 Beta 6

Author: Zachary 'Clack' Cole

project_precommit_check

@@ -89,9 +89,9 @@ supported_configs = {
         },
         '5.1': {
             'version': 'Apple Swift version 5.1 '
-                       '(swiftlang-1100.0.266.1 clang-1100.0.32.1)\n'
+                       '(swiftlang-1100.0.270.6 clang-1100.0.32.1)\n'
                        'Target: x86_64-apple-darwin18.2.0\n',
-            'description': 'Xcode 11 Beta 5 (contains Swift 5.1)',
+            'description': 'Xcode 11 Beta 6 (contains Swift 5.1)',
             'branch': 'swift-5.1-branch'
         }
     },