Added vivado synth

Signed-off-by: Joppe Blondel <joppe@blondel.nl>

examples/.gen/sources_1/ip/rst_gen/rst_gen.xdc

@@ -0,0 +1,49 @@
+
+# file: rst_gen.xdc
+# (c) Copyright 2009 - 2013 Xilinx, Inc. All rights reserved.
+# 
+# This file contains confidential and proprietary information
+# of Xilinx, Inc. and is protected under U.S. and
+# international copyright and other intellectual property
+# laws.
+# 
+# DISCLAIMER
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+# otherwise provided in a valid license issued to you by
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+# law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
+# WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
+# AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
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+# including negligence, or under any other theory of
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+# 
+# CRITICAL APPLICATIONS
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+# PART OF THIS FILE AT ALL TIMES.
+
+set_false_path -to [get_pins -hier *cdc_to*/D]