[Test] Update existing tests

Author: theblixguy

test/Sema/enum_conformance_synthesis.swift

@@ -61,7 +61,7 @@ func customHashable() {
 enum InvalidCustomHashable {
   case A, B
 
-  var hashValue: String { return "" } // expected-error {{invalid redeclaration of synthesized witness for protocol requirement 'hashValue'}}
+  var hashValue: String { return "" } // expected-error {{invalid redeclaration of synthesized implementation for protocol requirement 'hashValue'}}
 }
 func ==(x: InvalidCustomHashable, y: InvalidCustomHashable) -> String {
   return ""

test/decl/var/property_wrappers.swift

@@ -850,8 +850,6 @@ struct WrapperWithProjectedValue<T> {
 }
 
 class TestInvalidRedeclaration1 {
-  // expected-error@-1 {{invalid redeclaration of synthesized property '_i'}}
-  // expected-error@-2 {{invalid redeclaration of synthesized property '$i'}}
 
   @WrapperWithProjectedValue var i = 17
   // expected-note@-1 {{'i' previously declared here}}
@@ -860,6 +858,8 @@ class TestInvalidRedeclaration1 {
 
   @WrapperWithProjectedValue var i = 39
   // expected-error@-1 {{invalid redeclaration of 'i'}}
+  // expected-error@-2 {{invalid redeclaration of synthesized property '$i'}}
+  // expected-error@-3 {{invalid redeclaration of synthesized property '_i'}}
 }
 
 // SR-12839