[poppler] Poppler 0.46.0 released

[Albert Astals Cid]

Available from
http://poppler.freedesktop.org/poppler-0.46.0.tar.xz

Changes against 0.45.0 include:
core:
 * cairo: fix bug in setAntialias()
 * cairo: Fix tiling patterns with BBox with non-zero x,y
 * cairo: try finding glyphs in substitute fonts by unicode value. Bug #96994
 * Added XRef modification flag
 * Added DocInfo setters & getters
 * Be less strict when parsing FitH Link destinations. Bug #96661

utils:
 * pdftocairo: revert the use of groups for blending into white page
 * pdftocairo: Use fprintf for printing errors
 * pdfinfo: Don't print pdf info when printing metadata, javascript, or 
structure. Bug #96801

glib:
 * Added document property setters & simplified getters
 * make document metatag gobject properties writeable

cpp:
 * pass len to GooString constructor in 
detail::ustring_to_unicode_GooString(). Bug #96426
 * Added functions to save a document
 * Added document property setters & getters

qt4:
 * Added document property setters & simplified getters

qt5:
 * Added document property setters & simplified getters

build system:
 * configure: Don't use -fPIC on cygwin
 * configure: Work with non gnu greps

Testing, patches and bug reports welcome.

Cheers,
  Albert