[poppler] Poppler 0.39.0 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-0.39.0.tar.xz

Changes against 0.38.0 include:
core:
 * Ignore the alternateSpace and tintTransform. Bug #92381
 * CairoOutputDev: Scale radial pattern. Bug #22098
 * CairoOutputDev: Implement function shading using mesh gradients. Bug #88394
 * Regression test improvements
 * Fix typos in error messages

build system:
 * Visual Studio 2015 now supports snprintf. Bug #93116

utils:
 * pdftops: fix %%PageBoundingBox. Bug #87161
 * pdftocairo: Fix double free when both user and owner passwords are given

glib:
 * Add duration_real to PopplerPageTransition. Bug #92040
 * Remove enum PopplerOrientation from API. Bug #93229
 * documentation improvements
 * glib-demo improvements

Testing, patches and bug reports welcome.

Cheers,
  Albert