Test: prefer -enable-builtin-module

Many tests that use `-parse-stdlib` only do so because they want access
to the Builtin module. Now that we have the flag and ability to import
it, use that instead.

Author: kavon

test/AutoDiff/IRGen/runtime.swift

@@ -1,6 +1,6 @@
-// RUN: %target-swift-frontend -parse-stdlib %s -emit-ir | %FileCheck %s
+// RUN: %target-swift-frontend -enable-builtin-module %s -emit-ir | %FileCheck %s
 
-import Swift
+import Builtin
 import _Differentiation
 
 @_silgen_name("test_context_builtins_with_type")

test/Concurrency/builtin_silgen.swift

@@ -1,8 +1,8 @@
-// RUN: %target-swift-frontend  -disable-availability-checking %s -parse-as-library -parse-stdlib -emit-sil -o - | %FileCheck %s
+// RUN: %target-swift-frontend  -disable-availability-checking %s -parse-as-library -enable-builtin-module -emit-sil -o - | %FileCheck %s
 
 // REQUIRES: concurrency
 
-import _Concurrency
+import Builtin
 
 @MainActor
 func suspend() async {}

test/Constraints/one_way_constraints.swift

@@ -1,5 +1,5 @@
-// RUN: %target-typecheck-verify-swift -swift-version 4 -parse-stdlib
-import Swift
+// RUN: %target-typecheck-verify-swift -swift-version 4 -enable-builtin-module
+import Builtin
 
 func int8Or16(_ x: Int8) -> Int8 { return x }
 func int8Or16(_ x: Int16) -> Int16 { return x }

test/Constraints/one_way_solve.swift

@@ -1,6 +1,6 @@
-// RUN: %target-typecheck-verify-swift -parse-stdlib -debug-constraints > %t.log 2>&1
+// RUN: %target-typecheck-verify-swift -enable-builtin-module -debug-constraints > %t.log 2>&1
 // RUN: %FileCheck %s < %t.log
-import Swift
+import Builtin
 
 
 func takeDoubleAndBool(_: Double, _: Bool) { }

test/Constraints/rdar64890308.swift

@@ -1,8 +1,8 @@
-// RUN: %target-typecheck-verify-swift -parse-stdlib
+// RUN: %target-typecheck-verify-swift -enable-builtin-module
 
 // rdar://64890308: Make sure we don't leave one-way constraints unsolved.
 
-import Swift
+import Builtin
 
 @resultBuilder
 class ArrayBuilder<Element> {

test/DebugInfo/doubleinlines.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -primary-file %s -emit-ir -g -parse-stdlib \
+// RUN: %target-swift-frontend -primary-file %s -emit-ir -g -enable-builtin-module \
 // RUN: -debug-info-format=codeview -O -parse-as-library \
 // RUN: -module-name DoubleInlines -o - | %FileCheck %s
 
@@ -16,3 +16,5 @@ func callCondFail(arg: Builtin.Int1, msg: Builtin.RawPointer) {
 // CHECK: ![[SCOPEONE]] = !DILocation(line: 0, scope: ![[SCOPETWO:.*]], inlinedAt: ![[SCOPETHREE:.*]])
 // CHECK: ![[SCOPETHREE]] = !DILocation(line: 6, scope: ![[FUNCSCOPE:.*]])
 // CHECK: ![[FUNCSCOPE:[0-9]+]] = distinct !DILexicalBlock(scope: ![[FUNC]],
+
+import Builtin