Updated Quartus version for unb2a from 15.1 to 16.0 in line with set_quartus scripting.

tools/modelsim/set_modelsim

@@ -59,7 +59,7 @@ else  # default site
     # Next line may be needed, but comment it if it yields ld.so errors
     export LD_PRELOAD=/home/software/freetype2/usr/lib/libfreetype.so
   elif [ "${TOOLSET}" = "unb2a" ]; then
-    . ${RADIOHDL}/tools/quartus/quartus_version.sh 15.1
+    . ${RADIOHDL}/tools/quartus/quartus_version.sh 16.0
     . ${RADIOHDL}/tools/modelsim/modelsim_version.sh 10.4
     # Next line may be needed, but comment it if it yields ld.so errors
     export LD_PRELOAD=/home/software/freetype2/usr/lib/libfreetype.so