scripts/tags.sh: add magic for declarations of popular kernel type

scripts/tags.sh: add magic for declarations of popular kernel type

1) Add magic for declarations of variables of popular kernel type like
   spinlock_t, list_head, wait_queue_head_t and other.

2) Add a set of specially handled declaration extentions like
   __attribute, __aligned and other.

3) Simplify pci_bus_* magic

Signed-off-by: Kirill V Tkhai <tkhai@yandex.ru>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>