fix failing tests

Author: OnyekachiSamuel

validation-test/Sema/type_checker_crashers_fixed/rdar27830834.swift

@@ -2,5 +2,5 @@
 
 var d = [String:String]()
 _ = "\(d.map{ [$0 : $0] })"
-// expected-error@-1 {{type 'Dictionary<String, String>.Element' (aka '(key: String, value: String)') cannot conform to 'Hashable'; only struct/enum/class types can conform to protocols}}
+// expected-error@-1 {{type 'Dictionary<String, String>.Element' (aka '(key: String, value: String)') cannot conform to 'Hashable'; only concrete types such as structs, enums and classes can conform to protocols}}
 // expected-note@-2 {{required by generic struct 'Dictionary' where 'Key' = 'Dictionary<String, String>.Element' (aka '(key: String, value: String)')}}

validation-test/compiler_crashers_2_fixed/0196-rdar48937223.swift

@@ -6,7 +6,7 @@ func fn<T, U: P>(_ arg1: T, arg2: (T) -> U) {}
 // expected-note@-1 {{required by global function 'fn(_:arg2:)' where 'U' = '()'}}
 
 func test(str: String) {
-  fn(str) { arg in // expected-error {{type '()' cannot conform to 'P'; only struct/enum/class types can conform to protocols}}
+  fn(str) { arg in // expected-error {{type '()' cannot conform to 'P'; only concrete types such as structs, enums and classes can conform to protocols}}
     <#FOO#> // expected-error {{editor placeholder in source file}}
   }
 }