pdfium: don't build PDFiumLibrary when PDFium is disabled

Rather provide a stub implementation of PDFiumLibrary::get(), so other
code can call it unconditionally.

This is meant to allow removing the 10 stub functions in
VectorGraphicSearch later.

Also fix up CppunitTest_xmlsecurity_signing to pass in the
disable-pdfium case by avoiding the known-problematic checks.

Change-Id: I748fcc5c623c5ce937bd2980bfdfaadbdf6cedf7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111564
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

0 files changed, 0 insertions, 0 deletions