[vala] (13 commits) Non-fast-forward update to branch tintou/gst-element-factory

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'tintou/gst-element-factory' 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:

  d0b892e... gstreamer-1.0: Unskip the ElementFactory.make/create_full v

Commits added to the branch:

  439c219... gtkmodule: Handle nested closure elements and bind them acc (*)
  56a90b0... vala: NullLiteral is not a valid argument for string concat (*)
  55677ef... tests: Add missing tests/structs/struct-static-field-initia (*)
  1473f3e... codegen: Correctly handle chain up of struct creation metho (*)
  29bef67... vala: Set is_yield_expression in async context when chainin (*)
  5d2d9a2... tests: Add more "chain up" tests to increase coverage (*)
  e3b7be0... vala: Drop duplicate check for unsupported flag of creation (*)
  c507539... vala: Drop duplicate check for unsupported flag of struct m (*)
  f593418... vala: Report statement parsing error if it is not meant to  (*)
  7b03a4b... codegen: Use a dedicated EmitContext for _variant_get*() fu (*)
  c2a5316... tests: Add "type-parameter property clash" test to increase (*)
  19135db... codegen: Initialize type parameter properties for generics  (*)
  b5db457... gstreamer-1.0: Unskip the ElementFactory.make/create_full()

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