[vala] (6 commits) Non-fast-forward update to branch wip/bug769229

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/bug769229' 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:

  45040eb... Support [FormatArg] attribute for parameters
  093f2ee... glib-2.0: Add [FormatArg] attributes to gettext functions
  e83b407... Add [FormatArg] attribute to Parser.get_error
  de191f7... Do not use non-literal printf format strings
  3267326... codegen: Avoid temporary variables for calls to [FormatArg]
  a549748... tests: Enable -Werror=format-security

Commits added to the branch:

  ca31b48... Support [FormatArg] attribute for parameters
  9d836a2... glib-2.0: Add [FormatArg] attributes to gettext functions
  2e0149a... Add [FormatArg] attribute to Parser.get_error
  5a2f6f2... Do not use non-literal printf format strings
  8654925... codegen: Avoid temporary variables for calls to [FormatArg]
  1d7ae87... tests: Enable -Werror=format-security