rmnet_shs: set gso_type when partially segmenting SKBs

Copy the gso_type in segmented SKBs to avoid warning of
packets not being able to be forwarded.

Change-Id: I163b00233439edead2508f63766d3531053bd57b
Acked-by: Ryan Chapman <rchapman@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>