Update manifest_name with the returned manifest name for superproject.
Update manifest_name with the returned manifest name for superproject.

This is similar to smart sync, allowing sync to benefit from the patched
manifest.

Bug: [google internal] b/190688390
Change-Id: I158a80afceca606dcd81ec76b2caede369f7ed03
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/312142
Reviewed-by: Raman Tenneti <66788d848ab03efc83371cd4b586a3110f9172ef@google.com>
Tested-by: Xin Li <93465216fd46a440eb04b27d6e009aced8b0c153@google.com>

GerritCodeReview/git-repo,lewixliu/git-repo,couchbasedeps/git-repo,GerritCodeReview/git-repo,lewixliu/git-repo,couchbasedeps/git-repo