123595: Add temporary debug code to find who prints '%{'.

solenv/bin/modules/installer/logger.pm

@@ -144,11 +144,12 @@ sub printf ($$@)
 {
     my ($self, $format, @arguments) = @_;
 
-    my $message = sprintf($format, @arguments);
-    if ($message =~ /\%/)
+    if ($format =~ /\%\{/)
     {
+        printf(">%s<\n", $format);
         PrintStackTrace();
     }
+    my $message = sprintf($format, @arguments);
     $self->print($message, 0);
 }
 
@@ -659,6 +660,7 @@ sub PrintStackTrace ()
     }
 }
 
+
 sub Die ($)
 {
     my ($message) = @_;