[embedded] Use consistent target to make IR matching easier.

Author: zoecarver

test/embedded/basic-irgen-no-stdlib.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-emit-ir %s -parse-stdlib -enable-experimental-feature Embedded | %FileCheck %s
+// RUN: %target-swift-emit-ir %s -parse-stdlib -enable-experimental-feature Embedded -target arm64e-apple-none | %FileCheck %s
 
 struct Bool {}
 
@@ -24,7 +24,7 @@ public func main() {
 
 // CHECK-LABEL: declare hidden swiftcc void @"$s4main5start1pyx_tAA6PlayerRzlFAA8ConcreteV_Tg5"()
 
-// CHECK-LABEL: define swiftcc void @"$s4mainAAyyF"()
+// CHECK-LABEL: define protected swiftcc void @"$s4mainAAyyF"()
 // CHECK-NEXT:  entry:
 // CHECK-NEXT:    call swiftcc void @"$s4main8ConcreteVACycfC"()
 // CHECK-NEXT:    call swiftcc void @"$s4main5start1pyx_tAA6PlayerRzlFAA8ConcreteV_Tg5"()