Improve the formatting for init's README.

Make sure the arguments to "mkdir" show up in the same block.

Before: https://android.googlesource.com/platform/system/core/+/c3a119caa3ae2068bf5280254c28c360af88153f/init/README.md
After: https://android.googlesource.com/platform/system/core/+/refs/changes/60/2528060/1/init/README.md

Test: N/A
Change-Id: I88b4931e70e2793566cce53c38c0295168463971
1 file changed