re PR go/78145 (Several go.test tests fail with error: integer constant overflow on 32bit targets)

PR go/78145
    compiler: don't put print/println constants into temporaries
    
    It's not necessary, and it breaks setting their type to int64/uint64
    when appropriate.
    
    This fixes GCC PR 78145.
    
    Reviewed-on: https://go-review.googlesource.com/32475

From-SVN: r241740

gcc/go/gofrontend/MERGE

@@ -1,4 +1,4 @@
-c353ffbe18d1538cac7f2a3fcefb846dbf1a6591
+919ef699fe56a9b40c2bd0df07ac1378ce4a7fab
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

gcc/go/gofrontend/expressions.cc

@@ -7193,7 +7193,7 @@ Builtin_call_expression::do_lower(Gogo*, Named_object* function,
 	   pa != this->args()->end();
 	   ++pa)
 	{
-	  if (!(*pa)->is_variable())
+	  if (!(*pa)->is_variable() && !(*pa)->is_constant())
 	    {
 	      Temporary_statement* temp =
 		Statement::make_temporary(NULL, *pa, loc);