added cmake code to automatically update git submodules

4 jobs for issue/git_submodules in 30 minutes and 14 seconds
Status Job ID Name Coverage
  Test
passed #8581
debian:10 clang-6-libcpp-17

00:30:13

passed #8580
debian:10 gcc-8-17

00:20:48

passed #8582
debian:9 gcc-6-14

00:22:36

passed #8583
ubuntu:18.04 clang-6-17

00:28:36