Temporarily disable Misc/fatal_error test.

Until rdar49665477 is fixed. It is failing on certainsystem
configurations.

Author: atrick

test/Misc/fatal_error.swift

@@ -1,5 +1,6 @@
 // RUN: not %target-swift-frontend -typecheck %s -sdk "" 2>&1 | %FileCheck -check-prefix=CHECK -check-prefix=NO-MODULE %s
 // RUN: not %target-swift-frontend -typecheck %s -resource-dir / 2>&1 | %FileCheck -check-prefix=CHECK -check-prefix=NO-STDLIB %s
+// REQUIRES: rdar49665477
 
 // NO-MODULE: error: no such module 'NonExistent'