graphics/gdcm and poppler-0.72.0

Hi,

let gdcm build with poppler-0.72.0.

Build and runtime tests both against the old (0.61.1) and new
(0.72.2) poppler are welcome.

If it still builds and works with the old poppler, this could be
committed before the poppler update.

Ciao,
Kili

Index: patches/patch-Applications_Cxx_gdcminfo_cxx
===================================================================
RCS file: patches/patch-Applications_Cxx_gdcminfo_cxx
diff -N patches/patch-Applications_Cxx_gdcminfo_cxx
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ patches/patch-Applications_Cxx_gdcminfo_cxx 27 Dec 2018 21:23:01 -0000
@@ -0,0 +1,40 @@
+$OpenBSD$
+
+Fix for newer poppler.
+
+Index: Applications/Cxx/gdcminfo.cxx
+--- Applications/Cxx/gdcminfo.cxx.orig
++++ Applications/Cxx/gdcminfo.cxx
+@@ -202,7 +202,7 @@ static std::string getInfoDate(Dict *infoDict, const c
+