setup_board: create qsize-$BOARD wrapper

This makes it easier to check the sizes of installed packages.

BUG=None
TEST=`./setup_board --board=x86-alex` generates working qsize-x86-alex

Change-Id: I0c3a74248246928d7b59cc97c06455a26c8c2c03
Reviewed-on: https://chromium-review.googlesource.com/176532
Reviewed-by: Yu-Ju Hong <yjhong@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/setup_board b/setup_board
index 5bd7813..7fb6a2f 100755
--- a/setup_board
+++ b/setup_board
@@ -120,7 +120,7 @@
   wrappers+=( "${wrapper}" )
 
   for wrapper in 'emerge --root-deps' ebuild eclean equery portageq \
-                 qcheck qfile qlist; do
+                 qcheck qfile qlist qsize; do
     _generate_wrapper ${wrapper}
   done