buildman: Fix bloat option when 'new' only drops functions

In the case where a new build only decreases sizes and does not increase
any size we still want to report what functions have been dropped when
doing a bloat comparison.

Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

tools/buildman/builder.py

@@ -847,7 +847,7 @@ class Builder:
         delta.reverse()
 
         args = [add, -remove, grow, -shrink, up, -down, up - down]
-        if max(args) == 0:
+        if max(args) == 0 and min(args) == 0:
             return
         args = [self.ColourNum(x) for x in args]
         indent = ' ' * 15