Add poppler_document_build_dests_tree() to glib frontend

Builds named destinations balanced binary tree in document.
6 jobs from add-named-dest-tree in 7 minutes and 7 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #78940
build

00:04:02

passed #78945
build_android

00:01:16

passed #78941
build_clang_libcpp

00:04:54

passed #78944
build_clazy

00:04:17

passed #78942
build_gcc_49

00:07:06

passed #78943
build_mingw64_fedora

00:03:38