Temporarily output mvs lengths for unoptimized classifications

This allows us to easily see their shape looking at the compiled code.  See
the previous commit for more of an explanation and examples.  And future
commits.

This allows us to analyze the compiler runlog and determine the frequency of
certain shapes to prioritize optimization efforts.

src/current/compiler/js.xsl

@@ -711,9 +711,7 @@
 
     <!-- the terribly ineffeient way -->
     <otherwise>
-      <if test="$nm = 1 and $nv = 1 and $ns = 0">
-        <message select="concat( 'notice: skip optimize m1v1 ', @as )" />
-      </if>
+      <sequence select="concat('/*m', $nm, 'v', $nv, 's', $ns, '*/')" />
 
       <sequence select="concat( $dest, '=[];', $compiler:nl )" />