docs: fix alignment of repo layout directory descriptions
tree2a24dc2b93ac0d1197839c589e6d93d132abf609
-rw-r--r-- 727 .gitignore
-rw-r--r-- 665 Makefile
-rw-r--r-- 3641 README.md
-rw-r--r-- 1699 README.uname
-rw-r--r-- 212 Sconfig
drwxr-xr-x - bin
drwxr-xr-x - contrib
drwxr-xr-x - docs
drwxr-xr-x - exception_lists
drwxr-xr-x - include
drwxr-xr-x - kernel
drwxr-xr-x - lib
drwxr-xr-x - share
drwxr-xr-x - tools
drwxr-xr-x - usr