[poppler] Poppler 0.38.0 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-0.38.0.tar.xz

Changes against 0.37.0 include:
core:
 * Splash: Multiply opacity in case of pattern colorspace. Bug #92592
 * Small form improvements on non ascii character rendering
 * Clarify README

build system:
 * Clarify internal DCT and JPX are only provided as deprecated fallbacks

utils:
 * pdftocairo: fix fit to page transformation

Testing, patches and bug reports welcome.

Cheers,
  Albert