Run tests for the new 'try?' behavior with '-swift-version 5'

Author: bjhomer

test/Parse/try.swift

@@ -1,4 +1,4 @@
-// RUN: %target-typecheck-verify-swift
+// RUN: %target-typecheck-verify-swift -swift-version 5
 
 // Intentionally has lower precedence than assignments and ?:
 infix operator %%%% : LowPrecedence

test/SILGen/errors.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-emit-silgen -parse-stdlib -enable-sil-ownership -Xllvm -sil-print-debuginfo -verify -primary-file %s %S/Inputs/errors_other.swift | %FileCheck %s
+// RUN: %target-swift-emit-silgen -parse-stdlib -enable-sil-ownership -Xllvm -sil-print-debuginfo -verify -swift-version 5 -primary-file %s %S/Inputs/errors_other.swift | %FileCheck %s
 
 // TODO: Turn back on ownership verification. I turned off the verification on
 // this file since it shows an ownership error that does not affect
@@ -721,7 +721,7 @@ func testOptionalTryThatNeverThrows() {
 // CHECK-NEXT: bb0:
 // CHECK-NEXT: [[BOX:%.+]] = alloc_box ${ var Optional<Cat> }
 // CHECK-NEXT: [[PB:%.*]] = project_box [[BOX]]
-// CHECK: [[FN:%.+]] = function_ref @$S6errors10make_a_catAA3CatCyKF
+// CHECK: [[FN:%.+]] = function_ref @$s6errors10make_a_catAA3CatCyKF
 // CHECK-NEXT: try_apply [[FN]]() : $@convention(thin) () -> (@owned Cat, @error Error), normal [[SUCCESS:[^ ]+]], error [[CLEANUPS:[^ ]+]],
 // CHECK: [[SUCCESS]]([[VALUE:%.+]] : @owned $Cat)
 // CHECK-NEXT: [[CAT_ENUM:%.+]] = enum $Optional<Cat>, #Optional.some!enumelt.1