Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "[centos jump] Add more missing required packages" into stable/euphrates
  - [centos jump] Add more missing required packages

    - gcc is required for NBD kernel module build;
    - gdisk is required for resizing rootfs in nbd-mounted chroot;

    Change-Id: I8863c126b75ce3a15998c03d2d159f53f5006f5d
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 59ced31f878c282fbeeaecfd0d29652b886882f8)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 7a464cc..c5d0050 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 7a464cc994463231bb7d5dfbc9a29bcfcea5bbdb
+Subproject commit c5d0050fd09db559d9c8f89e8c148ecd7ccedc4f