Fix tests

Author: snarang181

clang/test/SemaCXX/type-traits-unsatisfied-diags.cpp

@@ -496,7 +496,7 @@ struct WithVirtual { // #sl-Virtual
 static_assert(__is_standard_layout(WithVirtual));
 // expected-error@-1 {{static assertion failed due to requirement '__is_standard_layout(standard_layout_tests::WithVirtual)'}} \
 // expected-note@-1 {{'WithVirtual' is not standard-layout}} \
-// expected-note@-1 {{because it has virtual functions}} \
+// expected-note@-1 {{because it has a virtual function}} \
 // expected-note@#sl-Virtual {{'WithVirtual' defined here}}
 
 struct MixedAccess { // #sl-Mixed
@@ -518,7 +518,7 @@ static_assert(__is_standard_layout(VB));
 // expected-note@-1 {{'VB' is not standard-layout}} \
 // expected-note@-1 {{because it has a virtual base 'VirtualBase'}} \
 // expected-note@-1 {{because it has a non-standard-layout base 'VirtualBase'}} \
-// expected-note@-1 {{because it has virtual functions}}
+// expected-note@-1 {{because it has a virtual function}}
 // expected-note@#sl-VB {{'VB' defined here}}
 
 union U {      // #sl-U