[tracker] (3 commits) Non-fast-forward update to branch wip/sam/meson

[Sam Thursfield <sthursfield src gnome org>]

The branch 'wip/sam/meson' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  94de8a0... Fix another pointer type mismatch
  a3000ff... Remove unused Vala dep
  d991bdb... Meson build instructions for Tracker

Commits added to the branch:

  2ddfdfa... Fix another printf format for gsize, it varies between 32/6 (*)
  3c36a6a... Remove unused Vala dep (*)
  857cf60... Meson build instructions for Tracker

(*) This commit already existed in another branch; no separate mail sent