build-tags.sh is broken because of removed 'test' folder, this breaks
helper make targets like 'make cscope', 'make tags', etc...
Fixing it by removing 'test' from source directories list.
Fixes: a9de470cc7c0 ("test: move to app directory")
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
Reviewed-by: Rami Rosen <ramirose@gmail.com>