In case of reabese of repository with submodules, submodules are left…

[igadmg]

… in non updatred state and prevent rebase from continuing.

Fixed that by updating submodules after rebase was initialized.

[AraHaan]

@yatagarasu25 the build still fails because missing docs on that publicly visible member.

[AraHaan]

@yatagarasu25 I just opened a pr to your fork to fix this pr.