Modified libdivecomputer to tweaked version

Tweaked libdivecomputer is needed to work on android.
Hence modified the submodule.

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>
Updated subsurface submodule to the latest commit

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>