[gn build] Run `git ls-files '*.gn' '*.gni' | xargs -n 1 gn format`

Looks like I forgot to do that for the PowerPC target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350711 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed