TJBench: Set TJ*OPT_PROGRESSIVE with -progressive

The documented behavior of the -progressive option is to use progressive
entropy coding in JPEG images generated by compression and transform
operations.  However, setting TJFLAG_PROGRESSIVE was insufficient to
accomplish that, because TJBench doesn't enable lossless transformation
if xformOpt == 0.

ChangeLog.md

@@ -48,6 +48,10 @@ image dimensions.
 8. Fixed an issue whereby the Java version of TJBench did not accept a range of
 quality values.
 
+9. Fixed an issue whereby, when `-progressive` was passed to TJBench, the JPEG
+input image was not transformed into a progressive JPEG image prior to
+decompression.
+
 
 2.1.4
 =====

java/TJBench.java

@@ -813,6 +813,7 @@ final class TJBench {
           } else if (argv[i].equalsIgnoreCase("-progressive")) {
             System.out.println("Using progressive entropy coding\n");
             flags |= TJ.FLAG_PROGRESSIVE;
+            xformOpt |= TJTransform.OPT_PROGRESSIVE;
           } else if (argv[i].equalsIgnoreCase("-rgb"))
             pf = TJ.PF_RGB;
           else if (argv[i].equalsIgnoreCase("-rgbx"))

tjbench.c

@@ -864,6 +864,7 @@ int main(int argc, char *argv[])
       } else if (!strcasecmp(argv[i], "-progressive")) {
         printf("Using progressive entropy coding\n\n");
         flags |= TJFLAG_PROGRESSIVE;
+        xformOpt |= TJXOPT_PROGRESSIVE;
       } else if (!strcasecmp(argv[i], "-rgb"))
         pf = TJPF_RGB;
       else if (!strcasecmp(argv[i], "-rgbx"))