Minidump: Add registration/update support for suspend context

Add support for registering (and updating) suspend context in
minidump. This is helpful for cases, where suspend/resume
path is stuck.

Change-Id: I7ea9d4bcba85a4a0a2336279a3ffade918d1bd77
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>