Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to a71176f4785190ff5e29f006bf7d1d612624bbd4
  - Merge "Fix issue with proxy for deb download behind proxy"
  - Fix issue with proxy for deb download behind proxy

    As curl tries to use ftp transfer for some of the packages in the
    list, what causes an issue behind some corporate proxies, this commit
    unifies the sources to prevent ftp

    Issue-ID: OOM-1746

    Change-Id: Ia7cac5a1c3d508749c3bea830c3df1137128e709
    Signed-off-by: Tomáš Levora <t.levora@partner.samsung.com>