add eigen test

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Merge pull request #389 from brad/eigen_test

Minor modifications by me:
* Commits squashed to one
* Added "--lib" to the `pkg-config` command

Merged-by: Timothy Gu <timothygu99@gmail.com>
Remove GMSL tests

We don't use them in any way.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Update GMSL to 1.1.5

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Add tool to update GMSL

Signed-off-by: Timothy Gu <timothygu99@gmail.com>