Set the reporting port to the error port by default

This is important for the get-javascript command, which outputs the
result to stdout. In order for this to be useful, it can be redirected
to a file, but if reporting information also goes to stdout, then it
ends up in the resulting JavaScript. Switching these messages to stderr
prevents that problem.

whalesong/parameters.rkt

@@ -88,7 +88,7 @@
 
 
 (: current-report-port (Parameterof Output-Port))
-(define current-report-port (make-parameter (current-output-port)))
+(define current-report-port (make-parameter (current-error-port)))
 
 
 (: current-timing-port (Parameterof Output-Port))

whalesong/whalesong-cmd.rkt

@@ -200,7 +200,7 @@
                       (current-verbose? #t)]
                      [("--debug-show-timings")
                       ("Display debug messages about compilation time.")
-                      (current-timing-port (current-output-port))]
+                      (current-timing-port (current-error-port))]
                      [("--enable-profiling")
                       ("Enable profiling to standard output")
                       (with-profiling? #t)]