[Clang] [NFC] Add single quotes around __builtin_bit_cast (llvm#116120)

Fixes llvm#116118

Author: a-tarasyuk

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -12366,7 +12366,7 @@ def err_preserve_enum_value_not_const: Error<
   "__builtin_preserve_enum_value argument %0 not a constant">;
 
 def err_bit_cast_non_trivially_copyable : Error<
-  "__builtin_bit_cast %select{source|destination}0 type must be trivially copyable">;
+  "'__builtin_bit_cast' %select{source|destination}0 type must be trivially copyable">;
 def err_bit_cast_type_size_mismatch : Error<
   "size of '__builtin_bit_cast' source type %0 does not match destination type %1 (%2 vs %3 bytes)">;
 

clang/test/SemaCXX/builtin-bit-cast.cpp

@@ -32,10 +32,10 @@ struct not_trivially_copyable {
   virtual void foo() {}
 };
 
-// expected-error@+1{{__builtin_bit_cast source type must be trivially copyable}}
+// expected-error@+1{{'__builtin_bit_cast' source type must be trivially copyable}}
 constexpr unsigned long ul = __builtin_bit_cast(unsigned long, not_trivially_copyable{});
 
-// expected-error@+1 {{__builtin_bit_cast destination type must be trivially copyable}}
+// expected-error@+1 {{'__builtin_bit_cast' destination type must be trivially copyable}}
 constexpr long us = __builtin_bit_cast(unsigned long &, 0L);
 
 namespace PR42936 {