Merge pull request swiftlang#330 from apple/on-a-lark

Un-XFAIL Lark

Author: Zachary 'Clack' Cole

projects.json

@@ -1291,17 +1291,7 @@
       {
         "action": "BuildSwiftPackage",
         "configuration": "release",
-        "tags": "sourcekit",
-        "xfail": {
-          "compatibility": {
-            "4.0": {
-              "branch": {
-                "master": "https://bugs.swift.org/browse/SR-8234",
-                "swift-5.0-branch": "https://bugs.swift.org/browse/SR-8234"
-              }
-            }
-          }
-        }
+        "tags": "sourcekit"
       },
       {
         "action": "TestSwiftPackage"