zandronum: 2.1.2 -> 3.0

remove sqlite-amalgamation and put it internal to the zandronum folder,
as it is only used by zandronum. Patches needed to avoid build impurities
and to get the correct protocol version to connect to public servers.

remove zandronum_bin as it is no longer needed

pkgs/games/zandronum/dont_update_gitinfo.patch

@@ -0,0 +1,19 @@
+diff -r dd3c3b57023f src/CMakeLists.txt
+--- a/src/CMakeLists.txt	Fri Sep 01 06:40:50 2017 -0500
++++ b/src/CMakeLists.txt	Fri Sep 15 01:46:34 2017 -0700
+@@ -636,15 +636,6 @@
+	add_definitions( -DBACKPATCH )
+ endif( BACKPATCH )
+
+-# Update gitinfo.h
+-
+-get_target_property( UPDATEREVISION_EXE updaterevision LOCATION )
+-
+-add_custom_target( revision_check ALL
+-	COMMAND ${UPDATEREVISION_EXE} src/gitinfo.h
+-	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+-	DEPENDS updaterevision )
+-
+ # Libraries ZDoom needs
+
+ message( STATUS "Fluid synth libs: ${FLUIDSYNTH_LIBRARIES}" )