get XILINX path from environment

Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@949 cc03376c-175c-47c8-b038-4cd826a8556b

Common/sim/compile_simprim.do

@@ -1,6 +1,6 @@
 vlib simprim
 
-set XILINX C:/Programme/Xilinx101/ISE
+set XILINX $env(XILINX)
 
 vcom -93 -work simprim  $XILINX/vhdl/src/simprims/simprim_Vcomponents_mti.vhd
 vcom -93 -work simprim  $XILINX/vhdl/src/simprims/simprim_Vpackage_mti.vhd

Common/sim/compile_unisim.do

@@ -1,6 +1,6 @@
 vlib unisim
 
-set XILINX C:/Programme/Xilinx101/ISE
+set XILINX $env(XILINX)
 
 vcom -93 -work unisim  $XILINX/vhdl/src/unisims/unisim_vpkg.vhd
 vcom -93 -work unisim  $XILINX/vhdl/src/unisims/unisim_vcomp.vhd