util: resource: Assign an unique resource id when a new resouce is created

util: resource: Assign an unique resource id when a new resouce is created

When PASS-daemon restarted unexpectedly, a pass client which is
survived in spite of PASS-daemon's restart can access resources
by using its own resource id (which is valid for previous PASS
daemon).

To prevent this situation, PASS should assign a unique resource
id for each created resource even if PASS daemon is restarted.
To this end, PASS initializes a global resource id (g_resource_id)
by using the value of gettimeofday(). So, each resource will be
assigned time-reflected resource id, and uniqueness is ensured
unless the number of created resources crosses the time consumed
before restarted.

Change-Id: I0e30addf01a0ee21b1f18aca56010d39d2c90c99
Signed-off-by: Sung-hun Kim <sfoon.kim@samsung.com>