tizen: Search for configuration files in /hal dir

tizen: Search for configuration files in /hal dir

Since Tizen 6.5, a HAL image is mounted on the /hal directory,
which contains hardware-specific configurations and drivers,
for better portability of Tizen.

This is the priority of path searching for configuration file.
 1. /etc/
 2. /run/
 3. /usr/local/lib/
 4. /usr/lib/
 5. /hal/lib/

When the same file exists, the higher priority file is used.
In this case, "/etc" is the highest priority.

Because hal can never override platform,
hal has a lower priority than platform.

Change-Id: Ie5e6cf98e64b4317bda23d49571b5c0f60084569
Signed-off-by: Hyotaek Shim <hyotaek.shim@samsung.com>
[ Change search order for /hal to be searched last ]
Signed-off-by: Karol Lewandowski <k.lewandowsk@samsung.com>