[gtk] (14 commits) ...Merge branch 'wip/baedert/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  3bf4c56... Pass common_cflags to print backends (*)
  2425d61... Pass common_cflags to testuite/gsk executables (*)
  43ba86b... tools: Pass common_cflags to executables (*)
  dd370db... reftests: Pass common_cflags (*)
  14c3bc5... tetsuite/a11y: Pass common_cflags to build (*)
  17c7662... bloatpad: Pass common_cflags to the build (*)
  7a768a2... build: Pass common_cflags to focus-chain test (*)
  20b906c... Build print backends with common_cflags (*)
  b92f417... builder-tool Make preview closeable (*)
  eebc2f2... testgtk: Add G_GNUC_NORETURN to usage() (*)
  9987163... unsetvalue: Add G_GNUC_NORETURN annotation (*)
  7235472... text: Assert that we have ranges before using them (*)
  db76b52... treeview: Remove `animate` parameters (*)
  ebc8b01... Merge branch 'wip/baedert/for-master' into 'master'

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