msm: kgsl: send snapshot dump file to dropbox

The device->snapshot doesn't contain all the data which is collected as
part of the snapshot.  Send the path to the snapshot dump file which will
contain all the data to dropbox.

Change-Id: Ia0d11cb9e0ac17b4c82606df2d265bc35493a439
Signed-off-by: Patrick Auchter <wpa722@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/617706
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Fred Fettinger <fettinge@motorola.com>
Reviewed-by: Stephen Rossbach <rossbach@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
SLTApproved: Christopher Fries <c.fries@motorola.com>