[Test] Disabled a test temporarily.

rdar://90495704

Author: nate-chandler

test/SILOptimizer/performance-annotations.swift

@@ -1,5 +1,6 @@
 // RUN: %target-swift-frontend -experimental-performance-annotations -emit-sil %s -o /dev/null -verify
 // REQUIRES: swift_stdlib_no_asserts,optimized_stdlib
+// REQUIRES: rdar90495704
 
 protocol P {
   func protoMethod(_ a: Int) -> Int