Update git submodules

* Update helpcontent2 from branch 'master'
  - Rename 'map' to 'hid2fileMap'.
    
    Also update dependency, so that the file gets rebuilt when the 'echo'
    part of the makefile changes.
    
    Change-Id: I0412f882dd12e265d8261a259ed83c469e261cdf
    Reviewed-on: https://gerrit.libreoffice.org/58993
    Tested-by: Jenkins
Reviewed-by: Jan Holesovsky <kendy@collabora.com>
    

helpcontent2 @ 1c76993a

-Subproject commit 3eea3745e5ee142962eb509032266e0c5762e943
+Subproject commit 1c76993a281f99a80c4dcbcf7e2133ef2dd3db69