Initial gitignore file for [Cadence...

Initial gitignore file for [Cadence Virtuoso](http://www.cadence.com/products/cic/Pages/default.aspx)
Cadence Virtuoso is a commercial EDA tool used for custom IC (ASIC) design. This gitignore file
blacklists database lock files, the contents of run directories for layout versus schematic and
design rule checks as well as log files for a selection of tools inside the package.

Global/Virtuoso.gitignore

+# Gitignore for Cadence Virtuoso
+################################################################
+
+# Log files
+*.log
+panic*.log.*
+
+# OpenAccess database lock files
+*.cdslck*
+
+# Run directories for layout vs. schematic and design rule check
+lvsRunDir/*
+drcRunDir/*
+
+# Abstract generation tool
+abstract.log*
+abstract.record*
+