[9610] wlbt: WLBTD collect log files and tar them

[9610] wlbt: WLBTD collect log files and tar them

For SBL support, we need wlbtd to collect various logs into a single tarball.
This patch adds the driver side changes to support this. A new EVENT_SABLE
and supporting infrastructure is introduced to handle trigger from log collection
(with reason for generating .sbl file) and EVENT_SABLE sent to wlbtd to generate
other logs (logcat, dmesg, mx.dump etc) and create tar containing .sbl file alongwith other logs.

for generating a tar this change dependens on change to wlbtd with EVENT_SABLE support.

Change-Id: I7a356327ef8cb74d5ff5cb7ce3fd12b880127601
SCSC-Bug-Id: SSB-41551
Signed-off-by: Purnendu Kapadia <p.kapadia@samsung.com>