Can specify specific paths of submodules to update
tree1a3ac448efeb6f8465c411255d618a5c0b239704
-rw-r--r-- 512 .gitignore
-rw-r--r-- 543 .gitmodules
drwxr-xr-x - Languages
-rw-r--r-- 2173 build.txt
drwxr-xr-x - common
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - ext
-rw-r--r-- 1742 release.txt
drwxr-xr-x - src
drwxr-xr-x - test