Update the version of rtklib
Update the version of rtklib

The commit number we used disappear. It seems the rtklib's repository is
pushed by the owner (force)

Updating the new commit number in order to build the packagegroup-gumstix
successfully

Signed-off-by: Jerry Hung <75926e095b28dd773adde5bade93e4836b1d92fc@gumstix.com>

gumstix/meta-gumstix-extras,gumstix/meta-gumstix-extras,gumstix/meta-gumstix-extras