tests: increase timeout of large_nested_array test

It fails on some jobs intermittently

rdar://115165160

Author: eeckstein

validation-test/SILOptimizer/large_nested_array.swift

@@ -1,10 +1,10 @@
 
 // The compiler should finish in about 5 seconds. To give some slack,
-// specify a timeout of 30 seconds
-// If the compiler needs more than 30 seconds, there is probably a real problem.
+// specify a timeout of 60 seconds
+// If the compiler needs more than 60 seconds, there is probably a real problem.
 // So please don't just increase the timeout in case this test fails.
 
-// RUN: %{python} %S/../../test/Inputs/timeout.py 30 %target-swift-frontend -O -parse-as-library -sil-verify-none -emit-sil %s | %FileCheck %s
+// RUN: %{python} %S/../../test/Inputs/timeout.py 60 %target-swift-frontend -O -parse-as-library -sil-verify-none -emit-sil %s | %FileCheck %s
 
 // REQUIRES: swift_stdlib_no_asserts,optimized_stdlib
 // REQUIRES: CPU=arm64 || CPU=x86_64 || CPU=aarch64