Cleanup Library_vcl.mk

Merge a few duplicate calls and generally prefer inline $(if ..)
over extra ifn?eq lines.

There are minimal changes:
* Move X11 settings from !DISABLE_GUI to USING_X11
* Move the vcl_opengl_denylist from WNT+!DISABLE_GUI to WNT only
* SkiaHelper compiles to "isVCLSkiaEnabled() { return false; }"
without the enabled feature, so move code to the general list.
* Move the SKIA library to !DISABLE_GUI, where the code is
* Move PDFium source + external to generic lists
* "extract" common ${vcl_headless_freetype_libs}

Change-Id: I9836ab3c1791b6406984ec4d4c27a8924faffdca
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/116220
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

0 files changed, 0 insertions, 0 deletions